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Theorem atantan 24364
Description: The arctangent function is an inverse to tan. (Contributed by Mario Carneiro, 5-Apr-2015.)
Assertion
Ref Expression
atantan ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (arctan‘(tan‘𝐴)) = 𝐴)

Proof of Theorem atantan
StepHypRef Expression
1 cosne0 23994 . . . 4 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (cos‘𝐴) ≠ 0)
2 atandmtan 24361 . . . 4 ((𝐴 ∈ ℂ ∧ (cos‘𝐴) ≠ 0) → (tan‘𝐴) ∈ dom arctan)
31, 2syldan 485 . . 3 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (tan‘𝐴) ∈ dom arctan)
4 atanval 24325 . . 3 ((tan‘𝐴) ∈ dom arctan → (arctan‘(tan‘𝐴)) = ((i / 2) · ((log‘(1 − (i · (tan‘𝐴)))) − (log‘(1 + (i · (tan‘𝐴)))))))
53, 4syl 17 . 2 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (arctan‘(tan‘𝐴)) = ((i / 2) · ((log‘(1 − (i · (tan‘𝐴)))) − (log‘(1 + (i · (tan‘𝐴)))))))
6 ax-1cn 9847 . . . . . . 7 1 ∈ ℂ
7 ax-icn 9848 . . . . . . . 8 i ∈ ℂ
8 tancl 14641 . . . . . . . . 9 ((𝐴 ∈ ℂ ∧ (cos‘𝐴) ≠ 0) → (tan‘𝐴) ∈ ℂ)
91, 8syldan 485 . . . . . . . 8 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (tan‘𝐴) ∈ ℂ)
10 mulcl 9873 . . . . . . . 8 ((i ∈ ℂ ∧ (tan‘𝐴) ∈ ℂ) → (i · (tan‘𝐴)) ∈ ℂ)
117, 9, 10sylancr 693 . . . . . . 7 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (i · (tan‘𝐴)) ∈ ℂ)
12 addcl 9871 . . . . . . 7 ((1 ∈ ℂ ∧ (i · (tan‘𝐴)) ∈ ℂ) → (1 + (i · (tan‘𝐴))) ∈ ℂ)
136, 11, 12sylancr 693 . . . . . 6 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (1 + (i · (tan‘𝐴))) ∈ ℂ)
14 atandm2 24318 . . . . . . . 8 ((tan‘𝐴) ∈ dom arctan ↔ ((tan‘𝐴) ∈ ℂ ∧ (1 − (i · (tan‘𝐴))) ≠ 0 ∧ (1 + (i · (tan‘𝐴))) ≠ 0))
153, 14sylib 206 . . . . . . 7 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((tan‘𝐴) ∈ ℂ ∧ (1 − (i · (tan‘𝐴))) ≠ 0 ∧ (1 + (i · (tan‘𝐴))) ≠ 0))
1615simp3d 1067 . . . . . 6 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (1 + (i · (tan‘𝐴))) ≠ 0)
1713, 16logcld 24035 . . . . 5 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (log‘(1 + (i · (tan‘𝐴)))) ∈ ℂ)
18 subcl 10128 . . . . . . 7 ((1 ∈ ℂ ∧ (i · (tan‘𝐴)) ∈ ℂ) → (1 − (i · (tan‘𝐴))) ∈ ℂ)
196, 11, 18sylancr 693 . . . . . 6 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (1 − (i · (tan‘𝐴))) ∈ ℂ)
2015simp2d 1066 . . . . . 6 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (1 − (i · (tan‘𝐴))) ≠ 0)
2119, 20logcld 24035 . . . . 5 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (log‘(1 − (i · (tan‘𝐴)))) ∈ ℂ)
2217, 21negsubdi2d 10256 . . . 4 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → -((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) = ((log‘(1 − (i · (tan‘𝐴)))) − (log‘(1 + (i · (tan‘𝐴))))))
23 efsub 14612 . . . . . . . . 9 (((log‘(1 + (i · (tan‘𝐴)))) ∈ ℂ ∧ (log‘(1 − (i · (tan‘𝐴)))) ∈ ℂ) → (exp‘((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴)))))) = ((exp‘(log‘(1 + (i · (tan‘𝐴))))) / (exp‘(log‘(1 − (i · (tan‘𝐴)))))))
2417, 21, 23syl2anc 690 . . . . . . . 8 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴)))))) = ((exp‘(log‘(1 + (i · (tan‘𝐴))))) / (exp‘(log‘(1 − (i · (tan‘𝐴)))))))
25 coscl 14639 . . . . . . . . . . . . 13 (𝐴 ∈ ℂ → (cos‘𝐴) ∈ ℂ)
2625adantr 479 . . . . . . . . . . . 12 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (cos‘𝐴) ∈ ℂ)
27 sincl 14638 . . . . . . . . . . . . . 14 (𝐴 ∈ ℂ → (sin‘𝐴) ∈ ℂ)
2827adantr 479 . . . . . . . . . . . . 13 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (sin‘𝐴) ∈ ℂ)
29 mulcl 9873 . . . . . . . . . . . . 13 ((i ∈ ℂ ∧ (sin‘𝐴) ∈ ℂ) → (i · (sin‘𝐴)) ∈ ℂ)
307, 28, 29sylancr 693 . . . . . . . . . . . 12 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (i · (sin‘𝐴)) ∈ ℂ)
3126, 30, 26, 1divdird 10685 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (((cos‘𝐴) + (i · (sin‘𝐴))) / (cos‘𝐴)) = (((cos‘𝐴) / (cos‘𝐴)) + ((i · (sin‘𝐴)) / (cos‘𝐴))))
3226, 1dividd 10645 . . . . . . . . . . . 12 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((cos‘𝐴) / (cos‘𝐴)) = 1)
337a1i 11 . . . . . . . . . . . . . 14 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → i ∈ ℂ)
3433, 28, 26, 1divassd 10682 . . . . . . . . . . . . 13 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((i · (sin‘𝐴)) / (cos‘𝐴)) = (i · ((sin‘𝐴) / (cos‘𝐴))))
35 tanval 14640 . . . . . . . . . . . . . . 15 ((𝐴 ∈ ℂ ∧ (cos‘𝐴) ≠ 0) → (tan‘𝐴) = ((sin‘𝐴) / (cos‘𝐴)))
361, 35syldan 485 . . . . . . . . . . . . . 14 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (tan‘𝐴) = ((sin‘𝐴) / (cos‘𝐴)))
3736oveq2d 6540 . . . . . . . . . . . . 13 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (i · (tan‘𝐴)) = (i · ((sin‘𝐴) / (cos‘𝐴))))
3834, 37eqtr4d 2643 . . . . . . . . . . . 12 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((i · (sin‘𝐴)) / (cos‘𝐴)) = (i · (tan‘𝐴)))
3932, 38oveq12d 6542 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (((cos‘𝐴) / (cos‘𝐴)) + ((i · (sin‘𝐴)) / (cos‘𝐴))) = (1 + (i · (tan‘𝐴))))
4031, 39eqtrd 2640 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (((cos‘𝐴) + (i · (sin‘𝐴))) / (cos‘𝐴)) = (1 + (i · (tan‘𝐴))))
41 efival 14664 . . . . . . . . . . . 12 (𝐴 ∈ ℂ → (exp‘(i · 𝐴)) = ((cos‘𝐴) + (i · (sin‘𝐴))))
4241adantr 479 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘(i · 𝐴)) = ((cos‘𝐴) + (i · (sin‘𝐴))))
4342oveq1d 6539 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((exp‘(i · 𝐴)) / (cos‘𝐴)) = (((cos‘𝐴) + (i · (sin‘𝐴))) / (cos‘𝐴)))
44 eflog 24041 . . . . . . . . . . 11 (((1 + (i · (tan‘𝐴))) ∈ ℂ ∧ (1 + (i · (tan‘𝐴))) ≠ 0) → (exp‘(log‘(1 + (i · (tan‘𝐴))))) = (1 + (i · (tan‘𝐴))))
4513, 16, 44syl2anc 690 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘(log‘(1 + (i · (tan‘𝐴))))) = (1 + (i · (tan‘𝐴))))
4640, 43, 453eqtr4d 2650 . . . . . . . . 9 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((exp‘(i · 𝐴)) / (cos‘𝐴)) = (exp‘(log‘(1 + (i · (tan‘𝐴))))))
4726, 30, 26, 1divsubdird 10686 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (((cos‘𝐴) − (i · (sin‘𝐴))) / (cos‘𝐴)) = (((cos‘𝐴) / (cos‘𝐴)) − ((i · (sin‘𝐴)) / (cos‘𝐴))))
4832, 38oveq12d 6542 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (((cos‘𝐴) / (cos‘𝐴)) − ((i · (sin‘𝐴)) / (cos‘𝐴))) = (1 − (i · (tan‘𝐴))))
4947, 48eqtrd 2640 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (((cos‘𝐴) − (i · (sin‘𝐴))) / (cos‘𝐴)) = (1 − (i · (tan‘𝐴))))
50 negcl 10129 . . . . . . . . . . . . . . 15 (𝐴 ∈ ℂ → -𝐴 ∈ ℂ)
5150adantr 479 . . . . . . . . . . . . . 14 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → -𝐴 ∈ ℂ)
52 efival 14664 . . . . . . . . . . . . . 14 (-𝐴 ∈ ℂ → (exp‘(i · -𝐴)) = ((cos‘-𝐴) + (i · (sin‘-𝐴))))
5351, 52syl 17 . . . . . . . . . . . . 13 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘(i · -𝐴)) = ((cos‘-𝐴) + (i · (sin‘-𝐴))))
54 cosneg 14659 . . . . . . . . . . . . . . 15 (𝐴 ∈ ℂ → (cos‘-𝐴) = (cos‘𝐴))
5554adantr 479 . . . . . . . . . . . . . 14 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (cos‘-𝐴) = (cos‘𝐴))
56 sinneg 14658 . . . . . . . . . . . . . . . . 17 (𝐴 ∈ ℂ → (sin‘-𝐴) = -(sin‘𝐴))
5756adantr 479 . . . . . . . . . . . . . . . 16 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (sin‘-𝐴) = -(sin‘𝐴))
5857oveq2d 6540 . . . . . . . . . . . . . . 15 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (i · (sin‘-𝐴)) = (i · -(sin‘𝐴)))
59 mulneg2 10315 . . . . . . . . . . . . . . . 16 ((i ∈ ℂ ∧ (sin‘𝐴) ∈ ℂ) → (i · -(sin‘𝐴)) = -(i · (sin‘𝐴)))
607, 28, 59sylancr 693 . . . . . . . . . . . . . . 15 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (i · -(sin‘𝐴)) = -(i · (sin‘𝐴)))
6158, 60eqtrd 2640 . . . . . . . . . . . . . 14 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (i · (sin‘-𝐴)) = -(i · (sin‘𝐴)))
6255, 61oveq12d 6542 . . . . . . . . . . . . 13 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((cos‘-𝐴) + (i · (sin‘-𝐴))) = ((cos‘𝐴) + -(i · (sin‘𝐴))))
6353, 62eqtrd 2640 . . . . . . . . . . . 12 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘(i · -𝐴)) = ((cos‘𝐴) + -(i · (sin‘𝐴))))
64 simpl 471 . . . . . . . . . . . . . 14 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → 𝐴 ∈ ℂ)
65 mulneg2 10315 . . . . . . . . . . . . . 14 ((i ∈ ℂ ∧ 𝐴 ∈ ℂ) → (i · -𝐴) = -(i · 𝐴))
667, 64, 65sylancr 693 . . . . . . . . . . . . 13 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (i · -𝐴) = -(i · 𝐴))
6766fveq2d 6089 . . . . . . . . . . . 12 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘(i · -𝐴)) = (exp‘-(i · 𝐴)))
6826, 30negsubd 10246 . . . . . . . . . . . 12 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((cos‘𝐴) + -(i · (sin‘𝐴))) = ((cos‘𝐴) − (i · (sin‘𝐴))))
6963, 67, 683eqtr3d 2648 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘-(i · 𝐴)) = ((cos‘𝐴) − (i · (sin‘𝐴))))
7069oveq1d 6539 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((exp‘-(i · 𝐴)) / (cos‘𝐴)) = (((cos‘𝐴) − (i · (sin‘𝐴))) / (cos‘𝐴)))
71 eflog 24041 . . . . . . . . . . 11 (((1 − (i · (tan‘𝐴))) ∈ ℂ ∧ (1 − (i · (tan‘𝐴))) ≠ 0) → (exp‘(log‘(1 − (i · (tan‘𝐴))))) = (1 − (i · (tan‘𝐴))))
7219, 20, 71syl2anc 690 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘(log‘(1 − (i · (tan‘𝐴))))) = (1 − (i · (tan‘𝐴))))
7349, 70, 723eqtr4d 2650 . . . . . . . . 9 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((exp‘-(i · 𝐴)) / (cos‘𝐴)) = (exp‘(log‘(1 − (i · (tan‘𝐴))))))
7446, 73oveq12d 6542 . . . . . . . 8 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (((exp‘(i · 𝐴)) / (cos‘𝐴)) / ((exp‘-(i · 𝐴)) / (cos‘𝐴))) = ((exp‘(log‘(1 + (i · (tan‘𝐴))))) / (exp‘(log‘(1 − (i · (tan‘𝐴)))))))
75 mulcl 9873 . . . . . . . . . . . 12 ((i ∈ ℂ ∧ 𝐴 ∈ ℂ) → (i · 𝐴) ∈ ℂ)
767, 64, 75sylancr 693 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (i · 𝐴) ∈ ℂ)
77 efcl 14595 . . . . . . . . . . 11 ((i · 𝐴) ∈ ℂ → (exp‘(i · 𝐴)) ∈ ℂ)
7876, 77syl 17 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘(i · 𝐴)) ∈ ℂ)
7976negcld 10227 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → -(i · 𝐴) ∈ ℂ)
80 efcl 14595 . . . . . . . . . . 11 (-(i · 𝐴) ∈ ℂ → (exp‘-(i · 𝐴)) ∈ ℂ)
8179, 80syl 17 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘-(i · 𝐴)) ∈ ℂ)
82 efne0 14609 . . . . . . . . . . 11 (-(i · 𝐴) ∈ ℂ → (exp‘-(i · 𝐴)) ≠ 0)
8379, 82syl 17 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘-(i · 𝐴)) ≠ 0)
8478, 81, 26, 83, 1divcan7d 10675 . . . . . . . . 9 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (((exp‘(i · 𝐴)) / (cos‘𝐴)) / ((exp‘-(i · 𝐴)) / (cos‘𝐴))) = ((exp‘(i · 𝐴)) / (exp‘-(i · 𝐴))))
85 efsub 14612 . . . . . . . . . 10 (((i · 𝐴) ∈ ℂ ∧ -(i · 𝐴) ∈ ℂ) → (exp‘((i · 𝐴) − -(i · 𝐴))) = ((exp‘(i · 𝐴)) / (exp‘-(i · 𝐴))))
8676, 79, 85syl2anc 690 . . . . . . . . 9 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘((i · 𝐴) − -(i · 𝐴))) = ((exp‘(i · 𝐴)) / (exp‘-(i · 𝐴))))
8776, 76subnegd 10247 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((i · 𝐴) − -(i · 𝐴)) = ((i · 𝐴) + (i · 𝐴)))
88762timesd 11119 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (2 · (i · 𝐴)) = ((i · 𝐴) + (i · 𝐴)))
8987, 88eqtr4d 2643 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((i · 𝐴) − -(i · 𝐴)) = (2 · (i · 𝐴)))
9089fveq2d 6089 . . . . . . . . 9 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘((i · 𝐴) − -(i · 𝐴))) = (exp‘(2 · (i · 𝐴))))
9184, 86, 903eqtr2d 2646 . . . . . . . 8 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (((exp‘(i · 𝐴)) / (cos‘𝐴)) / ((exp‘-(i · 𝐴)) / (cos‘𝐴))) = (exp‘(2 · (i · 𝐴))))
9224, 74, 913eqtr2d 2646 . . . . . . 7 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴)))))) = (exp‘(2 · (i · 𝐴))))
9392fveq2d 6089 . . . . . 6 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (log‘(exp‘((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))))) = (log‘(exp‘(2 · (i · 𝐴)))))
943adantr 479 . . . . . . . . 9 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (tan‘𝐴) ∈ dom arctan)
9551adantr 479 . . . . . . . . . . . . 13 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → -𝐴 ∈ ℂ)
9664adantr 479 . . . . . . . . . . . . . . 15 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → 𝐴 ∈ ℂ)
9796renegd 13740 . . . . . . . . . . . . . 14 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (ℜ‘-𝐴) = -(ℜ‘𝐴))
9896recld 13725 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (ℜ‘𝐴) ∈ ℝ)
9998renegcld 10305 . . . . . . . . . . . . . . 15 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → -(ℜ‘𝐴) ∈ ℝ)
100 simpr 475 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (ℜ‘𝐴) < 0)
10198lt0neg1d 10443 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → ((ℜ‘𝐴) < 0 ↔ 0 < -(ℜ‘𝐴)))
102100, 101mpbid 220 . . . . . . . . . . . . . . 15 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → 0 < -(ℜ‘𝐴))
103 eliooord 12057 . . . . . . . . . . . . . . . . . . 19 ((ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2)) → (-(π / 2) < (ℜ‘𝐴) ∧ (ℜ‘𝐴) < (π / 2)))
104103adantl 480 . . . . . . . . . . . . . . . . . 18 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (-(π / 2) < (ℜ‘𝐴) ∧ (ℜ‘𝐴) < (π / 2)))
105104simpld 473 . . . . . . . . . . . . . . . . 17 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → -(π / 2) < (ℜ‘𝐴))
106105adantr 479 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → -(π / 2) < (ℜ‘𝐴))
107 halfpire 23934 . . . . . . . . . . . . . . . . 17 (π / 2) ∈ ℝ
108 ltnegcon1 10375 . . . . . . . . . . . . . . . . 17 (((π / 2) ∈ ℝ ∧ (ℜ‘𝐴) ∈ ℝ) → (-(π / 2) < (ℜ‘𝐴) ↔ -(ℜ‘𝐴) < (π / 2)))
109107, 98, 108sylancr 693 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (-(π / 2) < (ℜ‘𝐴) ↔ -(ℜ‘𝐴) < (π / 2)))
110106, 109mpbid 220 . . . . . . . . . . . . . . 15 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → -(ℜ‘𝐴) < (π / 2))
111 0xr 9939 . . . . . . . . . . . . . . . 16 0 ∈ ℝ*
112107rexri 9945 . . . . . . . . . . . . . . . 16 (π / 2) ∈ ℝ*
113 elioo2 12040 . . . . . . . . . . . . . . . 16 ((0 ∈ ℝ* ∧ (π / 2) ∈ ℝ*) → (-(ℜ‘𝐴) ∈ (0(,)(π / 2)) ↔ (-(ℜ‘𝐴) ∈ ℝ ∧ 0 < -(ℜ‘𝐴) ∧ -(ℜ‘𝐴) < (π / 2))))
114111, 112, 113mp2an 703 . . . . . . . . . . . . . . 15 (-(ℜ‘𝐴) ∈ (0(,)(π / 2)) ↔ (-(ℜ‘𝐴) ∈ ℝ ∧ 0 < -(ℜ‘𝐴) ∧ -(ℜ‘𝐴) < (π / 2)))
11599, 102, 110, 114syl3anbrc 1238 . . . . . . . . . . . . . 14 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → -(ℜ‘𝐴) ∈ (0(,)(π / 2)))
11697, 115eqeltrd 2684 . . . . . . . . . . . . 13 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (ℜ‘-𝐴) ∈ (0(,)(π / 2)))
117 tanregt0 24003 . . . . . . . . . . . . 13 ((-𝐴 ∈ ℂ ∧ (ℜ‘-𝐴) ∈ (0(,)(π / 2))) → 0 < (ℜ‘(tan‘-𝐴)))
11895, 116, 117syl2anc 690 . . . . . . . . . . . 12 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → 0 < (ℜ‘(tan‘-𝐴)))
119 tanneg 14660 . . . . . . . . . . . . . . . 16 ((𝐴 ∈ ℂ ∧ (cos‘𝐴) ≠ 0) → (tan‘-𝐴) = -(tan‘𝐴))
1201, 119syldan 485 . . . . . . . . . . . . . . 15 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (tan‘-𝐴) = -(tan‘𝐴))
121120adantr 479 . . . . . . . . . . . . . 14 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (tan‘-𝐴) = -(tan‘𝐴))
122121fveq2d 6089 . . . . . . . . . . . . 13 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (ℜ‘(tan‘-𝐴)) = (ℜ‘-(tan‘𝐴)))
1239adantr 479 . . . . . . . . . . . . . 14 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (tan‘𝐴) ∈ ℂ)
124123renegd 13740 . . . . . . . . . . . . 13 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (ℜ‘-(tan‘𝐴)) = -(ℜ‘(tan‘𝐴)))
125122, 124eqtrd 2640 . . . . . . . . . . . 12 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (ℜ‘(tan‘-𝐴)) = -(ℜ‘(tan‘𝐴)))
126118, 125breqtrd 4600 . . . . . . . . . . 11 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → 0 < -(ℜ‘(tan‘𝐴)))
1279recld 13725 . . . . . . . . . . . . 13 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (ℜ‘(tan‘𝐴)) ∈ ℝ)
128127adantr 479 . . . . . . . . . . . 12 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (ℜ‘(tan‘𝐴)) ∈ ℝ)
129128lt0neg1d 10443 . . . . . . . . . . 11 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → ((ℜ‘(tan‘𝐴)) < 0 ↔ 0 < -(ℜ‘(tan‘𝐴))))
130126, 129mpbird 245 . . . . . . . . . 10 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (ℜ‘(tan‘𝐴)) < 0)
131130lt0ne0d 10439 . . . . . . . . 9 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (ℜ‘(tan‘𝐴)) ≠ 0)
132 atanlogsub 24357 . . . . . . . . 9 (((tan‘𝐴) ∈ dom arctan ∧ (ℜ‘(tan‘𝐴)) ≠ 0) → ((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) ∈ ran log)
13394, 131, 132syl2anc 690 . . . . . . . 8 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → ((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) ∈ ran log)
134 1re 9892 . . . . . . . . . . . . 13 1 ∈ ℝ
135 ioossre 12059 . . . . . . . . . . . . . 14 (-1(,)1) ⊆ ℝ
1367a1i 11 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → i ∈ ℂ)
13711adantr 479 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (i · (tan‘𝐴)) ∈ ℂ)
138 ine0 10313 . . . . . . . . . . . . . . . . 17 i ≠ 0
139138a1i 11 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → i ≠ 0)
140 ixi 10502 . . . . . . . . . . . . . . . . . . 19 (i · i) = -1
141140oveq1i 6534 . . . . . . . . . . . . . . . . . 18 ((i · i) · (tan‘𝐴)) = (-1 · (tan‘𝐴))
1429adantr 479 . . . . . . . . . . . . . . . . . . . 20 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (tan‘𝐴) ∈ ℂ)
143142mulm1d 10329 . . . . . . . . . . . . . . . . . . 19 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (-1 · (tan‘𝐴)) = -(tan‘𝐴))
144120adantr 479 . . . . . . . . . . . . . . . . . . 19 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (tan‘-𝐴) = -(tan‘𝐴))
145143, 144eqtr4d 2643 . . . . . . . . . . . . . . . . . 18 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (-1 · (tan‘𝐴)) = (tan‘-𝐴))
146141, 145syl5eq 2652 . . . . . . . . . . . . . . . . 17 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → ((i · i) · (tan‘𝐴)) = (tan‘-𝐴))
147136, 136, 142mulassd 9916 . . . . . . . . . . . . . . . . 17 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → ((i · i) · (tan‘𝐴)) = (i · (i · (tan‘𝐴))))
148140oveq1i 6534 . . . . . . . . . . . . . . . . . . . 20 ((i · i) · 𝐴) = (-1 · 𝐴)
14964adantr 479 . . . . . . . . . . . . . . . . . . . . 21 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → 𝐴 ∈ ℂ)
150149mulm1d 10329 . . . . . . . . . . . . . . . . . . . 20 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (-1 · 𝐴) = -𝐴)
151148, 150syl5eq 2652 . . . . . . . . . . . . . . . . . . 19 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → ((i · i) · 𝐴) = -𝐴)
152136, 136, 149mulassd 9916 . . . . . . . . . . . . . . . . . . 19 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → ((i · i) · 𝐴) = (i · (i · 𝐴)))
153151, 152eqtr3d 2642 . . . . . . . . . . . . . . . . . 18 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → -𝐴 = (i · (i · 𝐴)))
154153fveq2d 6089 . . . . . . . . . . . . . . . . 17 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (tan‘-𝐴) = (tan‘(i · (i · 𝐴))))
155146, 147, 1543eqtr3d 2648 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (i · (i · (tan‘𝐴))) = (tan‘(i · (i · 𝐴))))
156136, 137, 139, 155mvllmuld 10703 . . . . . . . . . . . . . . 15 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (i · (tan‘𝐴)) = ((tan‘(i · (i · 𝐴))) / i))
15776adantr 479 . . . . . . . . . . . . . . . . 17 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (i · 𝐴) ∈ ℂ)
158 reim 13640 . . . . . . . . . . . . . . . . . . . 20 (𝐴 ∈ ℂ → (ℜ‘𝐴) = (ℑ‘(i · 𝐴)))
159158adantr 479 . . . . . . . . . . . . . . . . . . 19 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (ℜ‘𝐴) = (ℑ‘(i · 𝐴)))
160159eqeq1d 2608 . . . . . . . . . . . . . . . . . 18 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((ℜ‘𝐴) = 0 ↔ (ℑ‘(i · 𝐴)) = 0))
161160biimpa 499 . . . . . . . . . . . . . . . . 17 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (ℑ‘(i · 𝐴)) = 0)
162157, 161reim0bd 13731 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (i · 𝐴) ∈ ℝ)
163 tanhbnd 14673 . . . . . . . . . . . . . . . 16 ((i · 𝐴) ∈ ℝ → ((tan‘(i · (i · 𝐴))) / i) ∈ (-1(,)1))
164162, 163syl 17 . . . . . . . . . . . . . . 15 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → ((tan‘(i · (i · 𝐴))) / i) ∈ (-1(,)1))
165156, 164eqeltrd 2684 . . . . . . . . . . . . . 14 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (i · (tan‘𝐴)) ∈ (-1(,)1))
166135, 165sseldi 3562 . . . . . . . . . . . . 13 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (i · (tan‘𝐴)) ∈ ℝ)
167 readdcl 9872 . . . . . . . . . . . . 13 ((1 ∈ ℝ ∧ (i · (tan‘𝐴)) ∈ ℝ) → (1 + (i · (tan‘𝐴))) ∈ ℝ)
168134, 166, 167sylancr 693 . . . . . . . . . . . 12 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (1 + (i · (tan‘𝐴))) ∈ ℝ)
169 df-neg 10117 . . . . . . . . . . . . . 14 -1 = (0 − 1)
170 eliooord 12057 . . . . . . . . . . . . . . . 16 ((i · (tan‘𝐴)) ∈ (-1(,)1) → (-1 < (i · (tan‘𝐴)) ∧ (i · (tan‘𝐴)) < 1))
171165, 170syl 17 . . . . . . . . . . . . . . 15 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (-1 < (i · (tan‘𝐴)) ∧ (i · (tan‘𝐴)) < 1))
172171simpld 473 . . . . . . . . . . . . . 14 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → -1 < (i · (tan‘𝐴)))
173169, 172syl5eqbrr 4610 . . . . . . . . . . . . 13 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (0 − 1) < (i · (tan‘𝐴)))
174 0red 9894 . . . . . . . . . . . . . 14 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → 0 ∈ ℝ)
175134a1i 11 . . . . . . . . . . . . . 14 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → 1 ∈ ℝ)
176174, 175, 166ltsubadd2d 10471 . . . . . . . . . . . . 13 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → ((0 − 1) < (i · (tan‘𝐴)) ↔ 0 < (1 + (i · (tan‘𝐴)))))
177173, 176mpbid 220 . . . . . . . . . . . 12 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → 0 < (1 + (i · (tan‘𝐴))))
178168, 177elrpd 11698 . . . . . . . . . . 11 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (1 + (i · (tan‘𝐴))) ∈ ℝ+)
179178relogcld 24087 . . . . . . . . . 10 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (log‘(1 + (i · (tan‘𝐴)))) ∈ ℝ)
180171simprd 477 . . . . . . . . . . . 12 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (i · (tan‘𝐴)) < 1)
181 difrp 11697 . . . . . . . . . . . . 13 (((i · (tan‘𝐴)) ∈ ℝ ∧ 1 ∈ ℝ) → ((i · (tan‘𝐴)) < 1 ↔ (1 − (i · (tan‘𝐴))) ∈ ℝ+))
182166, 134, 181sylancl 692 . . . . . . . . . . . 12 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → ((i · (tan‘𝐴)) < 1 ↔ (1 − (i · (tan‘𝐴))) ∈ ℝ+))
183180, 182mpbid 220 . . . . . . . . . . 11 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (1 − (i · (tan‘𝐴))) ∈ ℝ+)
184183relogcld 24087 . . . . . . . . . 10 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (log‘(1 − (i · (tan‘𝐴)))) ∈ ℝ)
185179, 184resubcld 10306 . . . . . . . . 9 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → ((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) ∈ ℝ)
186 relogrn 24026 . . . . . . . . 9 (((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) ∈ ℝ → ((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) ∈ ran log)
187185, 186syl 17 . . . . . . . 8 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → ((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) ∈ ran log)
1883adantr 479 . . . . . . . . 9 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ 0 < (ℜ‘𝐴)) → (tan‘𝐴) ∈ dom arctan)
18964adantr 479 . . . . . . . . . . 11 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ 0 < (ℜ‘𝐴)) → 𝐴 ∈ ℂ)
190189recld 13725 . . . . . . . . . . . 12 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ 0 < (ℜ‘𝐴)) → (ℜ‘𝐴) ∈ ℝ)
191 simpr 475 . . . . . . . . . . . 12 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ 0 < (ℜ‘𝐴)) → 0 < (ℜ‘𝐴))
192104simprd 477 . . . . . . . . . . . . 13 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (ℜ‘𝐴) < (π / 2))
193192adantr 479 . . . . . . . . . . . 12 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ 0 < (ℜ‘𝐴)) → (ℜ‘𝐴) < (π / 2))
194 elioo2 12040 . . . . . . . . . . . . 13 ((0 ∈ ℝ* ∧ (π / 2) ∈ ℝ*) → ((ℜ‘𝐴) ∈ (0(,)(π / 2)) ↔ ((ℜ‘𝐴) ∈ ℝ ∧ 0 < (ℜ‘𝐴) ∧ (ℜ‘𝐴) < (π / 2))))
195111, 112, 194mp2an 703 . . . . . . . . . . . 12 ((ℜ‘𝐴) ∈ (0(,)(π / 2)) ↔ ((ℜ‘𝐴) ∈ ℝ ∧ 0 < (ℜ‘𝐴) ∧ (ℜ‘𝐴) < (π / 2)))
196190, 191, 193, 195syl3anbrc 1238 . . . . . . . . . . 11 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ 0 < (ℜ‘𝐴)) → (ℜ‘𝐴) ∈ (0(,)(π / 2)))
197 tanregt0 24003 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (0(,)(π / 2))) → 0 < (ℜ‘(tan‘𝐴)))
198189, 196, 197syl2anc 690 . . . . . . . . . 10 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ 0 < (ℜ‘𝐴)) → 0 < (ℜ‘(tan‘𝐴)))
199198gt0ne0d 10438 . . . . . . . . 9 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ 0 < (ℜ‘𝐴)) → (ℜ‘(tan‘𝐴)) ≠ 0)
200188, 199, 132syl2anc 690 . . . . . . . 8 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ 0 < (ℜ‘𝐴)) → ((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) ∈ ran log)
201 recl 13641 . . . . . . . . . 10 (𝐴 ∈ ℂ → (ℜ‘𝐴) ∈ ℝ)
202201adantr 479 . . . . . . . . 9 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (ℜ‘𝐴) ∈ ℝ)
203 0re 9893 . . . . . . . . 9 0 ∈ ℝ
204 lttri4 9970 . . . . . . . . 9 (((ℜ‘𝐴) ∈ ℝ ∧ 0 ∈ ℝ) → ((ℜ‘𝐴) < 0 ∨ (ℜ‘𝐴) = 0 ∨ 0 < (ℜ‘𝐴)))
205202, 203, 204sylancl 692 . . . . . . . 8 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((ℜ‘𝐴) < 0 ∨ (ℜ‘𝐴) = 0 ∨ 0 < (ℜ‘𝐴)))
206133, 187, 200, 205mpjao3dan 1386 . . . . . . 7 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) ∈ ran log)
207 logef 24046 . . . . . . 7 (((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) ∈ ran log → (log‘(exp‘((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))))) = ((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))))
208206, 207syl 17 . . . . . 6 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (log‘(exp‘((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))))) = ((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))))
209 2cn 10935 . . . . . . . . 9 2 ∈ ℂ
210 mulcl 9873 . . . . . . . . 9 ((2 ∈ ℂ ∧ (i · 𝐴) ∈ ℂ) → (2 · (i · 𝐴)) ∈ ℂ)
211209, 76, 210sylancr 693 . . . . . . . 8 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (2 · (i · 𝐴)) ∈ ℂ)
212 picn 23929 . . . . . . . . . . . 12 π ∈ ℂ
213 2ne0 10957 . . . . . . . . . . . 12 2 ≠ 0
214 divneg 10565 . . . . . . . . . . . 12 ((π ∈ ℂ ∧ 2 ∈ ℂ ∧ 2 ≠ 0) → -(π / 2) = (-π / 2))
215212, 209, 213, 214mp3an 1415 . . . . . . . . . . 11 -(π / 2) = (-π / 2)
216215, 105syl5eqbrr 4610 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (-π / 2) < (ℜ‘𝐴))
217 pire 23928 . . . . . . . . . . . . 13 π ∈ ℝ
218217renegcli 10190 . . . . . . . . . . . 12 -π ∈ ℝ
219218a1i 11 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → -π ∈ ℝ)
220 2re 10934 . . . . . . . . . . . 12 2 ∈ ℝ
221220a1i 11 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → 2 ∈ ℝ)
222 2pos 10956 . . . . . . . . . . . 12 0 < 2
223222a1i 11 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → 0 < 2)
224 ltdivmul 10744 . . . . . . . . . . 11 ((-π ∈ ℝ ∧ (ℜ‘𝐴) ∈ ℝ ∧ (2 ∈ ℝ ∧ 0 < 2)) → ((-π / 2) < (ℜ‘𝐴) ↔ -π < (2 · (ℜ‘𝐴))))
225219, 202, 221, 223, 224syl112anc 1321 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((-π / 2) < (ℜ‘𝐴) ↔ -π < (2 · (ℜ‘𝐴))))
226216, 225mpbid 220 . . . . . . . . 9 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → -π < (2 · (ℜ‘𝐴)))
227 immul2 13668 . . . . . . . . . . 11 ((2 ∈ ℝ ∧ (i · 𝐴) ∈ ℂ) → (ℑ‘(2 · (i · 𝐴))) = (2 · (ℑ‘(i · 𝐴))))
228220, 76, 227sylancr 693 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (ℑ‘(2 · (i · 𝐴))) = (2 · (ℑ‘(i · 𝐴))))
229159oveq2d 6540 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (2 · (ℜ‘𝐴)) = (2 · (ℑ‘(i · 𝐴))))
230228, 229eqtr4d 2643 . . . . . . . . 9 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (ℑ‘(2 · (i · 𝐴))) = (2 · (ℜ‘𝐴)))
231226, 230breqtrrd 4602 . . . . . . . 8 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → -π < (ℑ‘(2 · (i · 𝐴))))
232 remulcl 9874 . . . . . . . . . . 11 ((2 ∈ ℝ ∧ (ℜ‘𝐴) ∈ ℝ) → (2 · (ℜ‘𝐴)) ∈ ℝ)
233220, 202, 232sylancr 693 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (2 · (ℜ‘𝐴)) ∈ ℝ)
234217a1i 11 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → π ∈ ℝ)
235 ltmuldiv2 10743 . . . . . . . . . . . 12 (((ℜ‘𝐴) ∈ ℝ ∧ π ∈ ℝ ∧ (2 ∈ ℝ ∧ 0 < 2)) → ((2 · (ℜ‘𝐴)) < π ↔ (ℜ‘𝐴) < (π / 2)))
236202, 234, 221, 223, 235syl112anc 1321 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((2 · (ℜ‘𝐴)) < π ↔ (ℜ‘𝐴) < (π / 2)))
237192, 236mpbird 245 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (2 · (ℜ‘𝐴)) < π)
238233, 234, 237ltled 10033 . . . . . . . . 9 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (2 · (ℜ‘𝐴)) ≤ π)
239230, 238eqbrtrd 4596 . . . . . . . 8 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (ℑ‘(2 · (i · 𝐴))) ≤ π)
240 ellogrn 24024 . . . . . . . 8 ((2 · (i · 𝐴)) ∈ ran log ↔ ((2 · (i · 𝐴)) ∈ ℂ ∧ -π < (ℑ‘(2 · (i · 𝐴))) ∧ (ℑ‘(2 · (i · 𝐴))) ≤ π))
241211, 231, 239, 240syl3anbrc 1238 . . . . . . 7 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (2 · (i · 𝐴)) ∈ ran log)
242 logef 24046 . . . . . . 7 ((2 · (i · 𝐴)) ∈ ran log → (log‘(exp‘(2 · (i · 𝐴)))) = (2 · (i · 𝐴)))
243241, 242syl 17 . . . . . 6 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (log‘(exp‘(2 · (i · 𝐴)))) = (2 · (i · 𝐴)))
24493, 208, 2433eqtr3d 2648 . . . . 5 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) = (2 · (i · 𝐴)))
245244negeqd 10123 . . . 4 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → -((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) = -(2 · (i · 𝐴)))
24622, 245eqtr3d 2642 . . 3 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((log‘(1 − (i · (tan‘𝐴)))) − (log‘(1 + (i · (tan‘𝐴))))) = -(2 · (i · 𝐴)))
247246oveq2d 6540 . 2 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((i / 2) · ((log‘(1 − (i · (tan‘𝐴)))) − (log‘(1 + (i · (tan‘𝐴)))))) = ((i / 2) · -(2 · (i · 𝐴))))
248 halfcl 11101 . . . . 5 (i ∈ ℂ → (i / 2) ∈ ℂ)
2497, 248mp1i 13 . . . 4 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (i / 2) ∈ ℂ)
250209a1i 11 . . . 4 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → 2 ∈ ℂ)
251249, 250, 79mulassd 9916 . . 3 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (((i / 2) · 2) · -(i · 𝐴)) = ((i / 2) · (2 · -(i · 𝐴))))
2527, 209, 213divcan1i 10615 . . . . 5 ((i / 2) · 2) = i
253252oveq1i 6534 . . . 4 (((i / 2) · 2) · -(i · 𝐴)) = (i · -(i · 𝐴))
25433, 33, 51mulassd 9916 . . . . 5 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((i · i) · -𝐴) = (i · (i · -𝐴)))
255140oveq1i 6534 . . . . . 6 ((i · i) · -𝐴) = (-1 · -𝐴)
256 mul2neg 10317 . . . . . . . 8 ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (-1 · -𝐴) = (1 · 𝐴))
2576, 64, 256sylancr 693 . . . . . . 7 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (-1 · -𝐴) = (1 · 𝐴))
258 mulid2 9891 . . . . . . . 8 (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴)
259258adantr 479 . . . . . . 7 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (1 · 𝐴) = 𝐴)
260257, 259eqtrd 2640 . . . . . 6 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (-1 · -𝐴) = 𝐴)
261255, 260syl5eq 2652 . . . . 5 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((i · i) · -𝐴) = 𝐴)
26266oveq2d 6540 . . . . 5 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (i · (i · -𝐴)) = (i · -(i · 𝐴)))
263254, 261, 2623eqtr3rd 2649 . . . 4 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (i · -(i · 𝐴)) = 𝐴)
264253, 263syl5eq 2652 . . 3 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (((i / 2) · 2) · -(i · 𝐴)) = 𝐴)
265 mulneg2 10315 . . . . 5 ((2 ∈ ℂ ∧ (i · 𝐴) ∈ ℂ) → (2 · -(i · 𝐴)) = -(2 · (i · 𝐴)))
266209, 76, 265sylancr 693 . . . 4 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (2 · -(i · 𝐴)) = -(2 · (i · 𝐴)))
267266oveq2d 6540 . . 3 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((i / 2) · (2 · -(i · 𝐴))) = ((i / 2) · -(2 · (i · 𝐴))))
268251, 264, 2673eqtr3rd 2649 . 2 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((i / 2) · -(2 · (i · 𝐴))) = 𝐴)
2695, 247, 2683eqtrd 2644 1 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (arctan‘(tan‘𝐴)) = 𝐴)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 194  wa 382  w3o 1029  w3a 1030   = wceq 1474  wcel 1976  wne 2776   class class class wbr 4574  dom cdm 5025  ran crn 5026  cfv 5787  (class class class)co 6524  cc 9787  cr 9788  0cc0 9789  1c1 9790  ici 9791   + caddc 9792   · cmul 9794  *cxr 9926   < clt 9927  cle 9928  cmin 10114  -cneg 10115   / cdiv 10530  2c2 10914  +crp 11661  (,)cioo 11999  cre 13628  cim 13629  expce 14574  sincsin 14576  cosccos 14577  tanctan 14578  πcpi 14579  logclog 24019  arctancatan 24305
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1712  ax-4 1727  ax-5 1826  ax-6 1874  ax-7 1921  ax-8 1978  ax-9 1985  ax-10 2005  ax-11 2020  ax-12 2032  ax-13 2229  ax-ext 2586  ax-rep 4690  ax-sep 4700  ax-nul 4709  ax-pow 4761  ax-pr 4825  ax-un 6821  ax-inf2 8395  ax-cnex 9845  ax-resscn 9846  ax-1cn 9847  ax-icn 9848  ax-addcl 9849  ax-addrcl 9850  ax-mulcl 9851  ax-mulrcl 9852  ax-mulcom 9853  ax-addass 9854  ax-mulass 9855  ax-distr 9856  ax-i2m1 9857  ax-1ne0 9858  ax-1rid 9859  ax-rnegex 9860  ax-rrecex 9861  ax-cnre 9862  ax-pre-lttri 9863  ax-pre-lttrn 9864  ax-pre-ltadd 9865  ax-pre-mulgt0 9866  ax-pre-sup 9867  ax-addf 9868  ax-mulf 9869
This theorem depends on definitions:  df-bi 195  df-or 383  df-an 384  df-3or 1031  df-3an 1032  df-tru 1477  df-fal 1480  df-ex 1695  df-nf 1700  df-sb 1867  df-eu 2458  df-mo 2459  df-clab 2593  df-cleq 2599  df-clel 2602  df-nfc 2736  df-ne 2778  df-nel 2779  df-ral 2897  df-rex 2898  df-reu 2899  df-rmo 2900  df-rab 2901  df-v 3171  df-sbc 3399  df-csb 3496  df-dif 3539  df-un 3541  df-in 3543  df-ss 3550  df-pss 3552  df-nul 3871  df-if 4033  df-pw 4106  df-sn 4122  df-pr 4124  df-tp 4126  df-op 4128  df-uni 4364  df-int 4402  df-iun 4448  df-iin 4449  df-br 4575  df-opab 4635  df-mpt 4636  df-tr 4672  df-eprel 4936  df-id 4940  df-po 4946  df-so 4947  df-fr 4984  df-se 4985  df-we 4986  df-xp 5031  df-rel 5032  df-cnv 5033  df-co 5034  df-dm 5035  df-rn 5036  df-res 5037  df-ima 5038  df-pred 5580  df-ord 5626  df-on 5627  df-lim 5628  df-suc 5629  df-iota 5751  df-fun 5789  df-fn 5790  df-f 5791  df-f1 5792  df-fo 5793  df-f1o 5794  df-fv 5795  df-isom 5796  df-riota 6486  df-ov 6527  df-oprab 6528  df-mpt2 6529  df-of 6769  df-om 6932  df-1st 7033  df-2nd 7034  df-supp 7157  df-wrecs 7268  df-recs 7329  df-rdg 7367  df-1o 7421  df-2o 7422  df-oadd 7425  df-er 7603  df-map 7720  df-pm 7721  df-ixp 7769  df-en 7816  df-dom 7817  df-sdom 7818  df-fin 7819  df-fsupp 8133  df-fi 8174  df-sup 8205  df-inf 8206  df-oi 8272  df-card 8622  df-cda 8847  df-pnf 9929  df-mnf 9930  df-xr 9931  df-ltxr 9932  df-le 9933  df-sub 10116  df-neg 10117  df-div 10531  df-nn 10865  df-2 10923  df-3 10924  df-4 10925  df-5 10926  df-6 10927  df-7 10928  df-8 10929  df-9 10930  df-n0 11137  df-z 11208  df-dec 11323  df-uz 11517  df-q 11618  df-rp 11662  df-xneg 11775  df-xadd 11776  df-xmul 11777  df-ioo 12003  df-ioc 12004  df-ico 12005  df-icc 12006  df-fz 12150  df-fzo 12287  df-fl 12407  df-mod 12483  df-seq 12616  df-exp 12675  df-fac 12875  df-bc 12904  df-hash 12932  df-shft 13598  df-cj 13630  df-re 13631  df-im 13632  df-sqrt 13766  df-abs 13767  df-limsup 13993  df-clim 14010  df-rlim 14011  df-sum 14208  df-ef 14580  df-sin 14582  df-cos 14583  df-tan 14584  df-pi 14585  df-struct 15640  df-ndx 15641  df-slot 15642  df-base 15643  df-sets 15644  df-ress 15645  df-plusg 15724  df-mulr 15725  df-starv 15726  df-sca 15727  df-vsca 15728  df-ip 15729  df-tset 15730  df-ple 15731  df-ds 15734  df-unif 15735  df-hom 15736  df-cco 15737  df-rest 15849  df-topn 15850  df-0g 15868  df-gsum 15869  df-topgen 15870  df-pt 15871  df-prds 15874  df-xrs 15928  df-qtop 15933  df-imas 15934  df-xps 15936  df-mre 16012  df-mrc 16013  df-acs 16015  df-mgm 17008  df-sgrp 17050  df-mnd 17061  df-submnd 17102  df-mulg 17307  df-cntz 17516  df-cmn 17961  df-psmet 19502  df-xmet 19503  df-met 19504  df-bl 19505  df-mopn 19506  df-fbas 19507  df-fg 19508  df-cnfld 19511  df-top 20460  df-bases 20461  df-topon 20462  df-topsp 20463  df-cld 20572  df-ntr 20573  df-cls 20574  df-nei 20651  df-lp 20689  df-perf 20690  df-cn 20780  df-cnp 20781  df-haus 20868  df-tx 21114  df-hmeo 21307  df-fil 21399  df-fm 21491  df-flim 21492  df-flf 21493  df-xms 21873  df-ms 21874  df-tms 21875  df-cncf 22417  df-limc 23350  df-dv 23351  df-log 24021  df-atan 24308
This theorem is referenced by:  atantanb  24365  atan1  24369
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