efiatan2 - Metamath Proof Explorer

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Theorem efiatan2 26658

Description: Value of the exponential of an artcangent. (Contributed by Mario Carneiro, 3-Apr-2015.)

**Assertion**
Ref	Expression
efiatan2	⊢ (𝐴 ∈ dom arctan → (exp‘(i · (arctan‘𝐴))) = ((1 + (i · 𝐴)) / (√‘(1 + (𝐴↑2)))))

**Proof of Theorem efiatan2**
Step	Hyp	Ref	Expression
1		ax-icn 11171	. . . . 5 ⊢ i ∈ ℂ
2		atancl 26622	. . . . 5 ⊢ (𝐴 ∈ dom arctan → (arctan‘𝐴) ∈ ℂ)
3		mulcl 11196	. . . . 5 ⊢ ((i ∈ ℂ ∧ (arctan‘𝐴) ∈ ℂ) → (i · (arctan‘𝐴)) ∈ ℂ)
4	1, 2, 3	sylancr 585	. . . 4 ⊢ (𝐴 ∈ dom arctan → (i · (arctan‘𝐴)) ∈ ℂ)
5		efcl 16030	. . . 4 ⊢ ((i · (arctan‘𝐴)) ∈ ℂ → (exp‘(i · (arctan‘𝐴))) ∈ ℂ)
6	4, 5	syl 17	. . 3 ⊢ (𝐴 ∈ dom arctan → (exp‘(i · (arctan‘𝐴))) ∈ ℂ)
7		ax-1cn 11170	. . . . 5 ⊢ 1 ∈ ℂ
8		atandm2 26618	. . . . . . 7 ⊢ (𝐴 ∈ dom arctan ↔ (𝐴 ∈ ℂ ∧ (1 − (i · 𝐴)) ≠ 0 ∧ (1 + (i · 𝐴)) ≠ 0))
9	8	simp1bi 1143	. . . . . 6 ⊢ (𝐴 ∈ dom arctan → 𝐴 ∈ ℂ)
10	9	sqcld 14113	. . . . 5 ⊢ (𝐴 ∈ dom arctan → (𝐴↑2) ∈ ℂ)
11		addcl 11194	. . . . 5 ⊢ ((1 ∈ ℂ ∧ (𝐴↑2) ∈ ℂ) → (1 + (𝐴↑2)) ∈ ℂ)
12	7, 10, 11	sylancr 585	. . . 4 ⊢ (𝐴 ∈ dom arctan → (1 + (𝐴↑2)) ∈ ℂ)
13	12	sqrtcld 15388	. . 3 ⊢ (𝐴 ∈ dom arctan → (√‘(1 + (𝐴↑2))) ∈ ℂ)
14	12	sqsqrtd 15390	. . . . 5 ⊢ (𝐴 ∈ dom arctan → ((√‘(1 + (𝐴↑2)))↑2) = (1 + (𝐴↑2)))
15		atandm4 26620	. . . . . 6 ⊢ (𝐴 ∈ dom arctan ↔ (𝐴 ∈ ℂ ∧ (1 + (𝐴↑2)) ≠ 0))
16	15	simprbi 495	. . . . 5 ⊢ (𝐴 ∈ dom arctan → (1 + (𝐴↑2)) ≠ 0)
17	14, 16	eqnetrd 3006	. . . 4 ⊢ (𝐴 ∈ dom arctan → ((√‘(1 + (𝐴↑2)))↑2) ≠ 0)
18		sqne0 14092	. . . . 5 ⊢ ((√‘(1 + (𝐴↑2))) ∈ ℂ → (((√‘(1 + (𝐴↑2)))↑2) ≠ 0 ↔ (√‘(1 + (𝐴↑2))) ≠ 0))
19	13, 18	syl 17	. . . 4 ⊢ (𝐴 ∈ dom arctan → (((√‘(1 + (𝐴↑2)))↑2) ≠ 0 ↔ (√‘(1 + (𝐴↑2))) ≠ 0))
20	17, 19	mpbid 231	. . 3 ⊢ (𝐴 ∈ dom arctan → (√‘(1 + (𝐴↑2))) ≠ 0)
21	6, 13, 20	divcan4d 12000	. 2 ⊢ (𝐴 ∈ dom arctan → (((exp‘(i · (arctan‘𝐴))) · (√‘(1 + (𝐴↑2)))) / (√‘(1 + (𝐴↑2)))) = (exp‘(i · (arctan‘𝐴))))
22		halfcn 12431	. . . . . . 7 ⊢ (1 / 2) ∈ ℂ
23	12, 16	logcld 26315	. . . . . . 7 ⊢ (𝐴 ∈ dom arctan → (log‘(1 + (𝐴↑2))) ∈ ℂ)
24		mulcl 11196	. . . . . . 7 ⊢ (((1 / 2) ∈ ℂ ∧ (log‘(1 + (𝐴↑2))) ∈ ℂ) → ((1 / 2) · (log‘(1 + (𝐴↑2)))) ∈ ℂ)
25	22, 23, 24	sylancr 585	. . . . . 6 ⊢ (𝐴 ∈ dom arctan → ((1 / 2) · (log‘(1 + (𝐴↑2)))) ∈ ℂ)
26		efadd 16041	. . . . . 6 ⊢ (((i · (arctan‘𝐴)) ∈ ℂ ∧ ((1 / 2) · (log‘(1 + (𝐴↑2)))) ∈ ℂ) → (exp‘((i · (arctan‘𝐴)) + ((1 / 2) · (log‘(1 + (𝐴↑2)))))) = ((exp‘(i · (arctan‘𝐴))) · (exp‘((1 / 2) · (log‘(1 + (𝐴↑2)))))))
27	4, 25, 26	syl2anc 582	. . . . 5 ⊢ (𝐴 ∈ dom arctan → (exp‘((i · (arctan‘𝐴)) + ((1 / 2) · (log‘(1 + (𝐴↑2)))))) = ((exp‘(i · (arctan‘𝐴))) · (exp‘((1 / 2) · (log‘(1 + (𝐴↑2)))))))
28		2cn 12291	. . . . . . . . . . . 12 ⊢ 2 ∈ ℂ
29	28	a1i 11	. . . . . . . . . . 11 ⊢ (𝐴 ∈ dom arctan → 2 ∈ ℂ)
30		mulcl 11196	. . . . . . . . . . . . . 14 ⊢ ((i ∈ ℂ ∧ 𝐴 ∈ ℂ) → (i · 𝐴) ∈ ℂ)
31	1, 9, 30	sylancr 585	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ dom arctan → (i · 𝐴) ∈ ℂ)
32		addcl 11194	. . . . . . . . . . . . 13 ⊢ ((1 ∈ ℂ ∧ (i · 𝐴) ∈ ℂ) → (1 + (i · 𝐴)) ∈ ℂ)
33	7, 31, 32	sylancr 585	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ dom arctan → (1 + (i · 𝐴)) ∈ ℂ)
34	8	simp3bi 1145	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ dom arctan → (1 + (i · 𝐴)) ≠ 0)
35	33, 34	logcld 26315	. . . . . . . . . . 11 ⊢ (𝐴 ∈ dom arctan → (log‘(1 + (i · 𝐴))) ∈ ℂ)
36	29, 35, 4	subdid 11674	. . . . . . . . . 10 ⊢ (𝐴 ∈ dom arctan → (2 · ((log‘(1 + (i · 𝐴))) − (i · (arctan‘𝐴)))) = ((2 · (log‘(1 + (i · 𝐴)))) − (2 · (i · (arctan‘𝐴)))))
37		atanval 26625	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ dom arctan → (arctan‘𝐴) = ((i / 2) · ((log‘(1 − (i · 𝐴))) − (log‘(1 + (i · 𝐴))))))
38	37	oveq2d 7427	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ dom arctan → ((2 · i) · (arctan‘𝐴)) = ((2 · i) · ((i / 2) · ((log‘(1 − (i · 𝐴))) − (log‘(1 + (i · 𝐴)))))))
39	1	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ dom arctan → i ∈ ℂ)
40	29, 39, 2	mulassd 11241	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ dom arctan → ((2 · i) · (arctan‘𝐴)) = (2 · (i · (arctan‘𝐴))))
41		halfcl 12441	. . . . . . . . . . . . . . . . . 18 ⊢ (i ∈ ℂ → (i / 2) ∈ ℂ)
42	1, 41	ax-mp 5	. . . . . . . . . . . . . . . . 17 ⊢ (i / 2) ∈ ℂ
43	28, 1, 42	mulassi 11229	. . . . . . . . . . . . . . . 16 ⊢ ((2 · i) · (i / 2)) = (2 · (i · (i / 2)))
44	28, 1, 42	mul12i 11413	. . . . . . . . . . . . . . . 16 ⊢ (2 · (i · (i / 2))) = (i · (2 · (i / 2)))
45		2ne0 12320	. . . . . . . . . . . . . . . . . . 19 ⊢ 2 ≠ 0
46	1, 28, 45	divcan2i 11961	. . . . . . . . . . . . . . . . . 18 ⊢ (2 · (i / 2)) = i
47	46	oveq2i 7422	. . . . . . . . . . . . . . . . 17 ⊢ (i · (2 · (i / 2))) = (i · i)
48		ixi 11847	. . . . . . . . . . . . . . . . 17 ⊢ (i · i) = -1
49	47, 48	eqtri 2758	. . . . . . . . . . . . . . . 16 ⊢ (i · (2 · (i / 2))) = -1
50	43, 44, 49	3eqtri 2762	. . . . . . . . . . . . . . 15 ⊢ ((2 · i) · (i / 2)) = -1
51	50	oveq1i 7421	. . . . . . . . . . . . . 14 ⊢ (((2 · i) · (i / 2)) · ((log‘(1 − (i · 𝐴))) − (log‘(1 + (i · 𝐴))))) = (-1 · ((log‘(1 − (i · 𝐴))) − (log‘(1 + (i · 𝐴)))))
52		subcl 11463	. . . . . . . . . . . . . . . . . 18 ⊢ ((1 ∈ ℂ ∧ (i · 𝐴) ∈ ℂ) → (1 − (i · 𝐴)) ∈ ℂ)
53	7, 31, 52	sylancr 585	. . . . . . . . . . . . . . . . 17 ⊢ (𝐴 ∈ dom arctan → (1 − (i · 𝐴)) ∈ ℂ)
54	8	simp2bi 1144	. . . . . . . . . . . . . . . . 17 ⊢ (𝐴 ∈ dom arctan → (1 − (i · 𝐴)) ≠ 0)
55	53, 54	logcld 26315	. . . . . . . . . . . . . . . 16 ⊢ (𝐴 ∈ dom arctan → (log‘(1 − (i · 𝐴))) ∈ ℂ)
56	55, 35	subcld 11575	. . . . . . . . . . . . . . 15 ⊢ (𝐴 ∈ dom arctan → ((log‘(1 − (i · 𝐴))) − (log‘(1 + (i · 𝐴)))) ∈ ℂ)
57	56	mulm1d 11670	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∈ dom arctan → (-1 · ((log‘(1 − (i · 𝐴))) − (log‘(1 + (i · 𝐴))))) = -((log‘(1 − (i · 𝐴))) − (log‘(1 + (i · 𝐴)))))
58	51, 57	eqtrid 2782	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ dom arctan → (((2 · i) · (i / 2)) · ((log‘(1 − (i · 𝐴))) − (log‘(1 + (i · 𝐴))))) = -((log‘(1 − (i · 𝐴))) − (log‘(1 + (i · 𝐴)))))
59		2mulicn 12439	. . . . . . . . . . . . . . 15 ⊢ (2 · i) ∈ ℂ
60	59	a1i 11	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∈ dom arctan → (2 · i) ∈ ℂ)
61	42	a1i 11	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∈ dom arctan → (i / 2) ∈ ℂ)
62	60, 61, 56	mulassd 11241	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ dom arctan → (((2 · i) · (i / 2)) · ((log‘(1 − (i · 𝐴))) − (log‘(1 + (i · 𝐴))))) = ((2 · i) · ((i / 2) · ((log‘(1 − (i · 𝐴))) − (log‘(1 + (i · 𝐴)))))))
63	55, 35	negsubdi2d 11591	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ dom arctan → -((log‘(1 − (i · 𝐴))) − (log‘(1 + (i · 𝐴)))) = ((log‘(1 + (i · 𝐴))) − (log‘(1 − (i · 𝐴)))))
64	58, 62, 63	3eqtr3d 2778	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ dom arctan → ((2 · i) · ((i / 2) · ((log‘(1 − (i · 𝐴))) − (log‘(1 + (i · 𝐴)))))) = ((log‘(1 + (i · 𝐴))) − (log‘(1 − (i · 𝐴)))))
65	38, 40, 64	3eqtr3d 2778	. . . . . . . . . . 11 ⊢ (𝐴 ∈ dom arctan → (2 · (i · (arctan‘𝐴))) = ((log‘(1 + (i · 𝐴))) − (log‘(1 − (i · 𝐴)))))
66	65	oveq2d 7427	. . . . . . . . . 10 ⊢ (𝐴 ∈ dom arctan → ((2 · (log‘(1 + (i · 𝐴)))) − (2 · (i · (arctan‘𝐴)))) = ((2 · (log‘(1 + (i · 𝐴)))) − ((log‘(1 + (i · 𝐴))) − (log‘(1 − (i · 𝐴))))))
67		mulcl 11196	. . . . . . . . . . . . 13 ⊢ ((2 ∈ ℂ ∧ (log‘(1 + (i · 𝐴))) ∈ ℂ) → (2 · (log‘(1 + (i · 𝐴)))) ∈ ℂ)
68	28, 35, 67	sylancr 585	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ dom arctan → (2 · (log‘(1 + (i · 𝐴)))) ∈ ℂ)
69	68, 35, 55	subsubd 11603	. . . . . . . . . . 11 ⊢ (𝐴 ∈ dom arctan → ((2 · (log‘(1 + (i · 𝐴)))) − ((log‘(1 + (i · 𝐴))) − (log‘(1 − (i · 𝐴))))) = (((2 · (log‘(1 + (i · 𝐴)))) − (log‘(1 + (i · 𝐴)))) + (log‘(1 − (i · 𝐴)))))
70	35	2timesd 12459	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ dom arctan → (2 · (log‘(1 + (i · 𝐴)))) = ((log‘(1 + (i · 𝐴))) + (log‘(1 + (i · 𝐴)))))
71	35, 35, 70	mvrladdd 11631	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ dom arctan → ((2 · (log‘(1 + (i · 𝐴)))) − (log‘(1 + (i · 𝐴)))) = (log‘(1 + (i · 𝐴))))
72	71	oveq1d 7426	. . . . . . . . . . 11 ⊢ (𝐴 ∈ dom arctan → (((2 · (log‘(1 + (i · 𝐴)))) − (log‘(1 + (i · 𝐴)))) + (log‘(1 − (i · 𝐴)))) = ((log‘(1 + (i · 𝐴))) + (log‘(1 − (i · 𝐴)))))
73		atanlogadd 26655	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ dom arctan → ((log‘(1 + (i · 𝐴))) + (log‘(1 − (i · 𝐴)))) ∈ ran log)
74		logef 26326	. . . . . . . . . . . . 13 ⊢ (((log‘(1 + (i · 𝐴))) + (log‘(1 − (i · 𝐴)))) ∈ ran log → (log‘(exp‘((log‘(1 + (i · 𝐴))) + (log‘(1 − (i · 𝐴)))))) = ((log‘(1 + (i · 𝐴))) + (log‘(1 − (i · 𝐴)))))
75	73, 74	syl 17	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ dom arctan → (log‘(exp‘((log‘(1 + (i · 𝐴))) + (log‘(1 − (i · 𝐴)))))) = ((log‘(1 + (i · 𝐴))) + (log‘(1 − (i · 𝐴)))))
76		efadd 16041	. . . . . . . . . . . . . . 15 ⊢ (((log‘(1 + (i · 𝐴))) ∈ ℂ ∧ (log‘(1 − (i · 𝐴))) ∈ ℂ) → (exp‘((log‘(1 + (i · 𝐴))) + (log‘(1 − (i · 𝐴))))) = ((exp‘(log‘(1 + (i · 𝐴)))) · (exp‘(log‘(1 − (i · 𝐴))))))
77	35, 55, 76	syl2anc 582	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∈ dom arctan → (exp‘((log‘(1 + (i · 𝐴))) + (log‘(1 − (i · 𝐴))))) = ((exp‘(log‘(1 + (i · 𝐴)))) · (exp‘(log‘(1 − (i · 𝐴))))))
78		eflog 26321	. . . . . . . . . . . . . . . 16 ⊢ (((1 + (i · 𝐴)) ∈ ℂ ∧ (1 + (i · 𝐴)) ≠ 0) → (exp‘(log‘(1 + (i · 𝐴)))) = (1 + (i · 𝐴)))
79	33, 34, 78	syl2anc 582	. . . . . . . . . . . . . . 15 ⊢ (𝐴 ∈ dom arctan → (exp‘(log‘(1 + (i · 𝐴)))) = (1 + (i · 𝐴)))
80		eflog 26321	. . . . . . . . . . . . . . . 16 ⊢ (((1 − (i · 𝐴)) ∈ ℂ ∧ (1 − (i · 𝐴)) ≠ 0) → (exp‘(log‘(1 − (i · 𝐴)))) = (1 − (i · 𝐴)))
81	53, 54, 80	syl2anc 582	. . . . . . . . . . . . . . 15 ⊢ (𝐴 ∈ dom arctan → (exp‘(log‘(1 − (i · 𝐴)))) = (1 − (i · 𝐴)))
82	79, 81	oveq12d 7429	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∈ dom arctan → ((exp‘(log‘(1 + (i · 𝐴)))) · (exp‘(log‘(1 − (i · 𝐴))))) = ((1 + (i · 𝐴)) · (1 − (i · 𝐴))))
83		sq1 14163	. . . . . . . . . . . . . . . . 17 ⊢ (1↑2) = 1
84	83	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ (𝐴 ∈ dom arctan → (1↑2) = 1)
85		sqmul 14088	. . . . . . . . . . . . . . . . . 18 ⊢ ((i ∈ ℂ ∧ 𝐴 ∈ ℂ) → ((i · 𝐴)↑2) = ((i↑2) · (𝐴↑2)))
86	1, 9, 85	sylancr 585	. . . . . . . . . . . . . . . . 17 ⊢ (𝐴 ∈ dom arctan → ((i · 𝐴)↑2) = ((i↑2) · (𝐴↑2)))
87		i2 14170	. . . . . . . . . . . . . . . . . . 19 ⊢ (i↑2) = -1
88	87	oveq1i 7421	. . . . . . . . . . . . . . . . . 18 ⊢ ((i↑2) · (𝐴↑2)) = (-1 · (𝐴↑2))
89	10	mulm1d 11670	. . . . . . . . . . . . . . . . . 18 ⊢ (𝐴 ∈ dom arctan → (-1 · (𝐴↑2)) = -(𝐴↑2))
90	88, 89	eqtrid 2782	. . . . . . . . . . . . . . . . 17 ⊢ (𝐴 ∈ dom arctan → ((i↑2) · (𝐴↑2)) = -(𝐴↑2))
91	86, 90	eqtrd 2770	. . . . . . . . . . . . . . . 16 ⊢ (𝐴 ∈ dom arctan → ((i · 𝐴)↑2) = -(𝐴↑2))
92	84, 91	oveq12d 7429	. . . . . . . . . . . . . . 15 ⊢ (𝐴 ∈ dom arctan → ((1↑2) − ((i · 𝐴)↑2)) = (1 − -(𝐴↑2)))
93		subsq 14178	. . . . . . . . . . . . . . . 16 ⊢ ((1 ∈ ℂ ∧ (i · 𝐴) ∈ ℂ) → ((1↑2) − ((i · 𝐴)↑2)) = ((1 + (i · 𝐴)) · (1 − (i · 𝐴))))
94	7, 31, 93	sylancr 585	. . . . . . . . . . . . . . 15 ⊢ (𝐴 ∈ dom arctan → ((1↑2) − ((i · 𝐴)↑2)) = ((1 + (i · 𝐴)) · (1 − (i · 𝐴))))
95		subneg 11513	. . . . . . . . . . . . . . . 16 ⊢ ((1 ∈ ℂ ∧ (𝐴↑2) ∈ ℂ) → (1 − -(𝐴↑2)) = (1 + (𝐴↑2)))
96	7, 10, 95	sylancr 585	. . . . . . . . . . . . . . 15 ⊢ (𝐴 ∈ dom arctan → (1 − -(𝐴↑2)) = (1 + (𝐴↑2)))
97	92, 94, 96	3eqtr3d 2778	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∈ dom arctan → ((1 + (i · 𝐴)) · (1 − (i · 𝐴))) = (1 + (𝐴↑2)))
98	77, 82, 97	3eqtrd 2774	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ dom arctan → (exp‘((log‘(1 + (i · 𝐴))) + (log‘(1 − (i · 𝐴))))) = (1 + (𝐴↑2)))
99	98	fveq2d 6894	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ dom arctan → (log‘(exp‘((log‘(1 + (i · 𝐴))) + (log‘(1 − (i · 𝐴)))))) = (log‘(1 + (𝐴↑2))))
100	75, 99	eqtr3d 2772	. . . . . . . . . . 11 ⊢ (𝐴 ∈ dom arctan → ((log‘(1 + (i · 𝐴))) + (log‘(1 − (i · 𝐴)))) = (log‘(1 + (𝐴↑2))))
101	69, 72, 100	3eqtrd 2774	. . . . . . . . . 10 ⊢ (𝐴 ∈ dom arctan → ((2 · (log‘(1 + (i · 𝐴)))) − ((log‘(1 + (i · 𝐴))) − (log‘(1 − (i · 𝐴))))) = (log‘(1 + (𝐴↑2))))
102	36, 66, 101	3eqtrd 2774	. . . . . . . . 9 ⊢ (𝐴 ∈ dom arctan → (2 · ((log‘(1 + (i · 𝐴))) − (i · (arctan‘𝐴)))) = (log‘(1 + (𝐴↑2))))
103	102	oveq1d 7426	. . . . . . . 8 ⊢ (𝐴 ∈ dom arctan → ((2 · ((log‘(1 + (i · 𝐴))) − (i · (arctan‘𝐴)))) / 2) = ((log‘(1 + (𝐴↑2))) / 2))
104	35, 4	subcld 11575	. . . . . . . . 9 ⊢ (𝐴 ∈ dom arctan → ((log‘(1 + (i · 𝐴))) − (i · (arctan‘𝐴))) ∈ ℂ)
105	45	a1i 11	. . . . . . . . 9 ⊢ (𝐴 ∈ dom arctan → 2 ≠ 0)
106	104, 29, 105	divcan3d 11999	. . . . . . . 8 ⊢ (𝐴 ∈ dom arctan → ((2 · ((log‘(1 + (i · 𝐴))) − (i · (arctan‘𝐴)))) / 2) = ((log‘(1 + (i · 𝐴))) − (i · (arctan‘𝐴))))
107	23, 29, 105	divrec2d 11998	. . . . . . . 8 ⊢ (𝐴 ∈ dom arctan → ((log‘(1 + (𝐴↑2))) / 2) = ((1 / 2) · (log‘(1 + (𝐴↑2)))))
108	103, 106, 107	3eqtr3d 2778	. . . . . . 7 ⊢ (𝐴 ∈ dom arctan → ((log‘(1 + (i · 𝐴))) − (i · (arctan‘𝐴))) = ((1 / 2) · (log‘(1 + (𝐴↑2)))))
109	35, 4, 25	subaddd 11593	. . . . . . 7 ⊢ (𝐴 ∈ dom arctan → (((log‘(1 + (i · 𝐴))) − (i · (arctan‘𝐴))) = ((1 / 2) · (log‘(1 + (𝐴↑2)))) ↔ ((i · (arctan‘𝐴)) + ((1 / 2) · (log‘(1 + (𝐴↑2))))) = (log‘(1 + (i · 𝐴)))))
110	108, 109	mpbid 231	. . . . . 6 ⊢ (𝐴 ∈ dom arctan → ((i · (arctan‘𝐴)) + ((1 / 2) · (log‘(1 + (𝐴↑2))))) = (log‘(1 + (i · 𝐴))))
111	110	fveq2d 6894	. . . . 5 ⊢ (𝐴 ∈ dom arctan → (exp‘((i · (arctan‘𝐴)) + ((1 / 2) · (log‘(1 + (𝐴↑2)))))) = (exp‘(log‘(1 + (i · 𝐴)))))
112	27, 111	eqtr3d 2772	. . . 4 ⊢ (𝐴 ∈ dom arctan → ((exp‘(i · (arctan‘𝐴))) · (exp‘((1 / 2) · (log‘(1 + (𝐴↑2)))))) = (exp‘(log‘(1 + (i · 𝐴)))))
113	22	a1i 11	. . . . . . 7 ⊢ (𝐴 ∈ dom arctan → (1 / 2) ∈ ℂ)
114	12, 16, 113	cxpefd 26456	. . . . . 6 ⊢ (𝐴 ∈ dom arctan → ((1 + (𝐴↑2))↑_𝑐(1 / 2)) = (exp‘((1 / 2) · (log‘(1 + (𝐴↑2))))))
115		cxpsqrt 26447	. . . . . . 7 ⊢ ((1 + (𝐴↑2)) ∈ ℂ → ((1 + (𝐴↑2))↑_𝑐(1 / 2)) = (√‘(1 + (𝐴↑2))))
116	12, 115	syl 17	. . . . . 6 ⊢ (𝐴 ∈ dom arctan → ((1 + (𝐴↑2))↑_𝑐(1 / 2)) = (√‘(1 + (𝐴↑2))))
117	114, 116	eqtr3d 2772	. . . . 5 ⊢ (𝐴 ∈ dom arctan → (exp‘((1 / 2) · (log‘(1 + (𝐴↑2))))) = (√‘(1 + (𝐴↑2))))
118	117	oveq2d 7427	. . . 4 ⊢ (𝐴 ∈ dom arctan → ((exp‘(i · (arctan‘𝐴))) · (exp‘((1 / 2) · (log‘(1 + (𝐴↑2)))))) = ((exp‘(i · (arctan‘𝐴))) · (√‘(1 + (𝐴↑2)))))
119	112, 118, 79	3eqtr3d 2778	. . 3 ⊢ (𝐴 ∈ dom arctan → ((exp‘(i · (arctan‘𝐴))) · (√‘(1 + (𝐴↑2)))) = (1 + (i · 𝐴)))
120	119	oveq1d 7426	. 2 ⊢ (𝐴 ∈ dom arctan → (((exp‘(i · (arctan‘𝐴))) · (√‘(1 + (𝐴↑2)))) / (√‘(1 + (𝐴↑2)))) = ((1 + (i · 𝐴)) / (√‘(1 + (𝐴↑2)))))
121	21, 120	eqtr3d 2772	1 ⊢ (𝐴 ∈ dom arctan → (exp‘(i · (arctan‘𝐴))) = ((1 + (i · 𝐴)) / (√‘(1 + (𝐴↑2)))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 = wceq 1539 ∈ wcel 2104 ≠ wne 2938 dom cdm 5675 ran crn 5676 ‘cfv 6542 (class class class)co 7411 ℂcc 11110 0cc0 11112 1c1 11113 ici 11114 + caddc 11115 · cmul 11117 − cmin 11448 -cneg 11449 / cdiv 11875 2c2 12271 ↑cexp 14031 √csqrt 15184 expce 16009 logclog 26299 ↑_𝑐ccxp 26300 arctancatan 26605

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2701 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7727 ax-inf2 9638 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189 ax-pre-sup 11190 ax-addf 11191

This theorem depends on definitions: df-bi 206 df-an 395 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2532 df-eu 2561 df-clab 2708 df-cleq 2722 df-clel 2808 df-nfc 2883 df-ne 2939 df-nel 3045 df-ral 3060 df-rex 3069 df-rmo 3374 df-reu 3375 df-rab 3431 df-v 3474 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-tp 4632 df-op 4634 df-uni 4908 df-int 4950 df-iun 4998 df-iin 4999 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-se 5631 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6299 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-isom 6551 df-riota 7367 df-ov 7414 df-oprab 7415 df-mpo 7416 df-of 7672 df-om 7858 df-1st 7977 df-2nd 7978 df-supp 8149 df-frecs 8268 df-wrecs 8299 df-recs 8373 df-rdg 8412 df-1o 8468 df-2o 8469 df-er 8705 df-map 8824 df-pm 8825 df-ixp 8894 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-fsupp 9364 df-fi 9408 df-sup 9439 df-inf 9440 df-oi 9507 df-card 9936 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-div 11876 df-nn 12217 df-2 12279 df-3 12280 df-4 12281 df-5 12282 df-6 12283 df-7 12284 df-8 12285 df-9 12286 df-n0 12477 df-z 12563 df-dec 12682 df-uz 12827 df-q 12937 df-rp 12979 df-xneg 13096 df-xadd 13097 df-xmul 13098 df-ioo 13332 df-ioc 13333 df-ico 13334 df-icc 13335 df-fz 13489 df-fzo 13632 df-fl 13761 df-mod 13839 df-seq 13971 df-exp 14032 df-fac 14238 df-bc 14267 df-hash 14295 df-shft 15018 df-cj 15050 df-re 15051 df-im 15052 df-sqrt 15186 df-abs 15187 df-limsup 15419 df-clim 15436 df-rlim 15437 df-sum 15637 df-ef 16015 df-sin 16017 df-cos 16018 df-pi 16020 df-struct 17084 df-sets 17101 df-slot 17119 df-ndx 17131 df-base 17149 df-ress 17178 df-plusg 17214 df-mulr 17215 df-starv 17216 df-sca 17217 df-vsca 17218 df-ip 17219 df-tset 17220 df-ple 17221 df-ds 17223 df-unif 17224 df-hom 17225 df-cco 17226 df-rest 17372 df-topn 17373 df-0g 17391 df-gsum 17392 df-topgen 17393 df-pt 17394 df-prds 17397 df-xrs 17452 df-qtop 17457 df-imas 17458 df-xps 17460 df-mre 17534 df-mrc 17535 df-acs 17537 df-mgm 18565 df-sgrp 18644 df-mnd 18660 df-submnd 18706 df-mulg 18987 df-cntz 19222 df-cmn 19691 df-psmet 21136 df-xmet 21137 df-met 21138 df-bl 21139 df-mopn 21140 df-fbas 21141 df-fg 21142 df-cnfld 21145 df-top 22616 df-topon 22633 df-topsp 22655 df-bases 22669 df-cld 22743 df-ntr 22744 df-cls 22745 df-nei 22822 df-lp 22860 df-perf 22861 df-cn 22951 df-cnp 22952 df-haus 23039 df-tx 23286 df-hmeo 23479 df-fil 23570 df-fm 23662 df-flim 23663 df-flf 23664 df-xms 24046 df-ms 24047 df-tms 24048 df-cncf 24618 df-limc 25615 df-dv 25616 df-log 26301 df-cxp 26302 df-atan 26608

This theorem is referenced by: cosatan 26662

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