Theorem sineq0ALT 42446

Description: A complex number whose sine is zero is an integer multiple of π. The Virtual Deduction form of the proof is https://us.metamath.org/other/completeusersproof/sineq0altvd.html. The Metamath form of the proof is sineq0ALT 42446. The Virtual Deduction proof is based on Mario Carneiro's revision of Norm Megill's proof of sineq0 25585. The Virtual Deduction proof is verified by automatically transforming it into the Metamath form of the proof using completeusersproof, which is verified by the Metamath program. The proof of https://us.metamath.org/other/completeusersproof/sineq0altro.html 25585 is a form of the completed proof which preserves the Virtual Deduction proof's step numbers and their ordering. (Contributed by Alan Sare, 13-Jun-2018.) (Proof modification is discouraged.) (New usage is discouraged.)

Assertion

Ref	Expression
sineq0ALT	⊢ (𝐴 ∈ ℂ → ((sin‘𝐴) = 0 ↔ (𝐴 / π) ∈ ℤ))

Proof of Theorem sineq0ALT

Step	Hyp	Ref	Expression
1		pire 25520	. . . . 5 ⊢ π ∈ ℝ
2		pipos 25522	. . . . 5 ⊢ 0 < π
3	1, 2	elrpii 12662	. . . 4 ⊢ π ∈ ℝ+
4		2ne0 12007	. . . . . 6 ⊢ 2 ≠ 0
5	4	a1i 11	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → 2 ≠ 0)
6		2cn 11978	. . . . . . 7 ⊢ 2 ∈ ℂ
7		2re 11977	. . . . . . . 8 ⊢ 2 ∈ ℝ
8	7	a1i 11	. . . . . . 7 ⊢ (2 ∈ ℂ → 2 ∈ ℝ)
9	6, 8	ax-mp 5	. . . . . 6 ⊢ 2 ∈ ℝ
10	9	a1i 11	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → 2 ∈ ℝ)
11		id 22	. . . . . 6 ⊢ (𝐴 ∈ ℂ → 𝐴 ∈ ℂ)
12	11	adantr 480	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → 𝐴 ∈ ℂ)
13	6	a1i 11	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → 2 ∈ ℂ)
14	13, 11	mulcld 10926	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (2 · 𝐴) ∈ ℂ)
15		ax-icn 10861	. . . . . . . . . . . . . . 15 ⊢ i ∈ ℂ
16	15	a1i 11	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∈ ℂ → i ∈ ℂ)
17	13, 16, 11	mul12d 11114	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ ℂ → (2 · (i · 𝐴)) = (i · (2 · 𝐴)))
18	16, 11	mulcld 10926	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∈ ℂ → (i · 𝐴) ∈ ℂ)
19	18	2timesd 12146	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ ℂ → (2 · (i · 𝐴)) = ((i · 𝐴) + (i · 𝐴)))
20	17, 19	eqtr3d 2780	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ ℂ → (i · (2 · 𝐴)) = ((i · 𝐴) + (i · 𝐴)))
21	20	fveq2d 6760	. . . . . . . . . . 11 ⊢ (𝐴 ∈ ℂ → (exp‘(i · (2 · 𝐴))) = (exp‘((i · 𝐴) + (i · 𝐴))))
22		efadd 15731	. . . . . . . . . . . 12 ⊢ (((i · 𝐴) ∈ ℂ ∧ (i · 𝐴) ∈ ℂ) → (exp‘((i · 𝐴) + (i · 𝐴))) = ((exp‘(i · 𝐴)) · (exp‘(i · 𝐴))))
23	18, 18, 22	syl2anc 583	. . . . . . . . . . 11 ⊢ (𝐴 ∈ ℂ → (exp‘((i · 𝐴) + (i · 𝐴))) = ((exp‘(i · 𝐴)) · (exp‘(i · 𝐴))))
24	21, 23	eqtrd 2778	. . . . . . . . . 10 ⊢ (𝐴 ∈ ℂ → (exp‘(i · (2 · 𝐴))) = ((exp‘(i · 𝐴)) · (exp‘(i · 𝐴))))
25	24	adantr 480	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (exp‘(i · (2 · 𝐴))) = ((exp‘(i · 𝐴)) · (exp‘(i · 𝐴))))
26		sinval 15759	. . . . . . . . . . . . . . 15 ⊢ (𝐴 ∈ ℂ → (sin‘𝐴) = (((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) / (2 · i)))
27		id 22	. . . . . . . . . . . . . . 15 ⊢ ((sin‘𝐴) = 0 → (sin‘𝐴) = 0)
28	26, 27	sylan9req 2800	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) / (2 · i)) = 0)
29		efcl 15720	. . . . . . . . . . . . . . . . . 18 ⊢ ((i · 𝐴) ∈ ℂ → (exp‘(i · 𝐴)) ∈ ℂ)
30	18, 29	syl 17	. . . . . . . . . . . . . . . . 17 ⊢ (𝐴 ∈ ℂ → (exp‘(i · 𝐴)) ∈ ℂ)
31		negicn 11152	. . . . . . . . . . . . . . . . . . . 20 ⊢ -i ∈ ℂ
32	31	a1i 11	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝐴 ∈ ℂ → -i ∈ ℂ)
33	32, 11	mulcld 10926	. . . . . . . . . . . . . . . . . 18 ⊢ (𝐴 ∈ ℂ → (-i · 𝐴) ∈ ℂ)
34		efcl 15720	. . . . . . . . . . . . . . . . . 18 ⊢ ((-i · 𝐴) ∈ ℂ → (exp‘(-i · 𝐴)) ∈ ℂ)
35	33, 34	syl 17	. . . . . . . . . . . . . . . . 17 ⊢ (𝐴 ∈ ℂ → (exp‘(-i · 𝐴)) ∈ ℂ)
36	30, 35	subcld 11262	. . . . . . . . . . . . . . . 16 ⊢ (𝐴 ∈ ℂ → ((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) ∈ ℂ)
37		2mulicn 12126	. . . . . . . . . . . . . . . . 17 ⊢ (2 · i) ∈ ℂ
38	37	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ (𝐴 ∈ ℂ → (2 · i) ∈ ℂ)
39		2muline0 12127	. . . . . . . . . . . . . . . . 17 ⊢ (2 · i) ≠ 0
40	39	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ (𝐴 ∈ ℂ → (2 · i) ≠ 0)
41	36, 38, 40	diveq0ad 11691	. . . . . . . . . . . . . . 15 ⊢ (𝐴 ∈ ℂ → ((((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) / (2 · i)) = 0 ↔ ((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) = 0))
42	41	adantr 480	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → ((((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) / (2 · i)) = 0 ↔ ((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) = 0))
43	28, 42	mpbid 231	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → ((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) = 0)
44	30, 35	subeq0ad 11272	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∈ ℂ → (((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) = 0 ↔ (exp‘(i · 𝐴)) = (exp‘(-i · 𝐴))))
45	44	adantr 480	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) = 0 ↔ (exp‘(i · 𝐴)) = (exp‘(-i · 𝐴))))
46	43, 45	mpbid 231	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (exp‘(i · 𝐴)) = (exp‘(-i · 𝐴)))
47	46	oveq2d 7271	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → ((exp‘(i · 𝐴)) · (exp‘(i · 𝐴))) = ((exp‘(i · 𝐴)) · (exp‘(-i · 𝐴))))
48		efadd 15731	. . . . . . . . . . . . 13 ⊢ (((i · 𝐴) ∈ ℂ ∧ (-i · 𝐴) ∈ ℂ) → (exp‘((i · 𝐴) + (-i · 𝐴))) = ((exp‘(i · 𝐴)) · (exp‘(-i · 𝐴))))
49	18, 33, 48	syl2anc 583	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ ℂ → (exp‘((i · 𝐴) + (-i · 𝐴))) = ((exp‘(i · 𝐴)) · (exp‘(-i · 𝐴))))
50	49	adantr 480	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (exp‘((i · 𝐴) + (-i · 𝐴))) = ((exp‘(i · 𝐴)) · (exp‘(-i · 𝐴))))
51	47, 50	eqtr4d 2781	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → ((exp‘(i · 𝐴)) · (exp‘(i · 𝐴))) = (exp‘((i · 𝐴) + (-i · 𝐴))))
52	16, 32, 11	adddird 10931	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∈ ℂ → ((i + -i) · 𝐴) = ((i · 𝐴) + (-i · 𝐴)))
53	15	negidi 11220	. . . . . . . . . . . . . . 15 ⊢ (i + -i) = 0
54	53	oveq1i 7265	. . . . . . . . . . . . . 14 ⊢ ((i + -i) · 𝐴) = (0 · 𝐴)
55	52, 54	eqtr3di 2794	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ ℂ → ((i · 𝐴) + (-i · 𝐴)) = (0 · 𝐴))
56	11	mul02d 11103	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ ℂ → (0 · 𝐴) = 0)
57	55, 56	eqtrd 2778	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ ℂ → ((i · 𝐴) + (-i · 𝐴)) = 0)
58	57	fveq2d 6760	. . . . . . . . . . 11 ⊢ (𝐴 ∈ ℂ → (exp‘((i · 𝐴) + (-i · 𝐴))) = (exp‘0))
59	58	adantr 480	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (exp‘((i · 𝐴) + (-i · 𝐴))) = (exp‘0))
60		ef0 15728	. . . . . . . . . . 11 ⊢ (exp‘0) = 1
61	60	a1i 11	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (exp‘0) = 1)
62	51, 59, 61	3eqtrd 2782	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → ((exp‘(i · 𝐴)) · (exp‘(i · 𝐴))) = 1)
63	25, 62	eqtrd 2778	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (exp‘(i · (2 · 𝐴))) = 1)
64	63	fveq2d 6760	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (abs‘(exp‘(i · (2 · 𝐴)))) = (abs‘1))
65		abs1 14937	. . . . . . 7 ⊢ (abs‘1) = 1
66	64, 65	eqtrdi 2795	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (abs‘(exp‘(i · (2 · 𝐴)))) = 1)
67		absefib 15835	. . . . . . . 8 ⊢ ((2 · 𝐴) ∈ ℂ → ((2 · 𝐴) ∈ ℝ ↔ (abs‘(exp‘(i · (2 · 𝐴)))) = 1))
68	67	biimparc 479	. . . . . . 7 ⊢ (((abs‘(exp‘(i · (2 · 𝐴)))) = 1 ∧ (2 · 𝐴) ∈ ℂ) → (2 · 𝐴) ∈ ℝ)
69	68	ancoms 458	. . . . . 6 ⊢ (((2 · 𝐴) ∈ ℂ ∧ (abs‘(exp‘(i · (2 · 𝐴)))) = 1) → (2 · 𝐴) ∈ ℝ)
70	14, 66, 69	syl2an2r 681	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (2 · 𝐴) ∈ ℝ)
71		mulre 14760	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 2 ∈ ℝ ∧ 2 ≠ 0) → (𝐴 ∈ ℝ ↔ (2 · 𝐴) ∈ ℝ))
72	71	4animp1 42006	. . . . . 6 ⊢ ((((𝐴 ∈ ℂ ∧ 2 ∈ ℝ) ∧ 2 ≠ 0) ∧ (2 · 𝐴) ∈ ℝ) → 𝐴 ∈ ℝ)
73	72	4an31 42007	. . . . 5 ⊢ ((((2 ≠ 0 ∧ 2 ∈ ℝ) ∧ 𝐴 ∈ ℂ) ∧ (2 · 𝐴) ∈ ℝ) → 𝐴 ∈ ℝ)
74	5, 10, 12, 70, 73	syl1111anc 836	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → 𝐴 ∈ ℝ)
75	3	a1i 11	. . . . . . . . . . . . . . 15 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → π ∈ ℝ+)
76	74, 75	modcld 13523	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 mod π) ∈ ℝ)
77	76	recnd 10934	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 mod π) ∈ ℂ)
78	77	sincld 15767	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (sin‘(𝐴 mod π)) ∈ ℂ)
79	1	a1i 11	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → π ∈ ℝ)
80		0re 10908	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ 0 ∈ ℝ
81	80, 1, 2	ltleii 11028	. . . . . . . . . . . . . . . . . . . . 21 ⊢ 0 ≤ π
82		gt0ne0 11370	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((π ∈ ℝ ∧ 0 < π) → π ≠ 0)
83	82	3adant3 1130	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((π ∈ ℝ ∧ 0 < π ∧ 0 ≤ π) → π ≠ 0)
84	83	3com23 1124	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((π ∈ ℝ ∧ 0 ≤ π ∧ 0 < π) → π ≠ 0)
85	1, 81, 2, 84	mp3an 1459	. . . . . . . . . . . . . . . . . . . 20 ⊢ π ≠ 0
86	85	a1i 11	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → π ≠ 0)
87	74, 79, 86	redivcld 11733	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 / π) ∈ ℝ)
88	87	flcld 13446	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (⌊‘(𝐴 / π)) ∈ ℤ)
89	88	znegcld 12357	. . . . . . . . . . . . . . . 16 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → -(⌊‘(𝐴 / π)) ∈ ℤ)
90		abssinper 25582	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐴 ∈ ℂ ∧ -(⌊‘(𝐴 / π)) ∈ ℤ) → (abs‘(sin‘(𝐴 + (-(⌊‘(𝐴 / π)) · π)))) = (abs‘(sin‘𝐴)))
91	90	eqcomd 2744	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐴 ∈ ℂ ∧ -(⌊‘(𝐴 / π)) ∈ ℤ) → (abs‘(sin‘𝐴)) = (abs‘(sin‘(𝐴 + (-(⌊‘(𝐴 / π)) · π)))))
92	91	ex 412	. . . . . . . . . . . . . . . . 17 ⊢ (𝐴 ∈ ℂ → (-(⌊‘(𝐴 / π)) ∈ ℤ → (abs‘(sin‘𝐴)) = (abs‘(sin‘(𝐴 + (-(⌊‘(𝐴 / π)) · π))))))
93	92	adantr 480	. . . . . . . . . . . . . . . 16 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (-(⌊‘(𝐴 / π)) ∈ ℤ → (abs‘(sin‘𝐴)) = (abs‘(sin‘(𝐴 + (-(⌊‘(𝐴 / π)) · π))))))
94	89, 93	mpd 15	. . . . . . . . . . . . . . 15 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (abs‘(sin‘𝐴)) = (abs‘(sin‘(𝐴 + (-(⌊‘(𝐴 / π)) · π)))))
95	88	zcnd 12356	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (⌊‘(𝐴 / π)) ∈ ℂ)
96	95	negcld 11249	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → -(⌊‘(𝐴 / π)) ∈ ℂ)
97	1	recni 10920	. . . . . . . . . . . . . . . . . . . . 21 ⊢ π ∈ ℂ
98	97	a1i 11	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → π ∈ ℂ)
99	96, 98	mulcld 10926	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (-(⌊‘(𝐴 / π)) · π) ∈ ℂ)
100	98, 95	mulcld 10926	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (π · (⌊‘(𝐴 / π))) ∈ ℂ)
101	100	negcld 11249	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → -(π · (⌊‘(𝐴 / π))) ∈ ℂ)
102	95, 98	mulneg1d 11358	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (-(⌊‘(𝐴 / π)) · π) = -((⌊‘(𝐴 / π)) · π))
103	95, 98	mulcomd 10927	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → ((⌊‘(𝐴 / π)) · π) = (π · (⌊‘(𝐴 / π))))
104	103	negeqd 11145	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → -((⌊‘(𝐴 / π)) · π) = -(π · (⌊‘(𝐴 / π))))
105	102, 104	eqtrd 2778	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (-(⌊‘(𝐴 / π)) · π) = -(π · (⌊‘(𝐴 / π))))
106		oveq2 7263	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((-(⌊‘(𝐴 / π)) · π) = -(π · (⌊‘(𝐴 / π))) → (𝐴 + (-(⌊‘(𝐴 / π)) · π)) = (𝐴 + -(π · (⌊‘(𝐴 / π)))))
107	106	ad3antrrr 726	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((((-(⌊‘(𝐴 / π)) · π) = -(π · (⌊‘(𝐴 / π))) ∧ -(π · (⌊‘(𝐴 / π))) ∈ ℂ) ∧ (-(⌊‘(𝐴 / π)) · π) ∈ ℂ) ∧ 𝐴 ∈ ℂ) → (𝐴 + (-(⌊‘(𝐴 / π)) · π)) = (𝐴 + -(π · (⌊‘(𝐴 / π)))))
108	107	4an4132 42008	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝐴 ∈ ℂ ∧ (-(⌊‘(𝐴 / π)) · π) ∈ ℂ) ∧ -(π · (⌊‘(𝐴 / π))) ∈ ℂ) ∧ (-(⌊‘(𝐴 / π)) · π) = -(π · (⌊‘(𝐴 / π)))) → (𝐴 + (-(⌊‘(𝐴 / π)) · π)) = (𝐴 + -(π · (⌊‘(𝐴 / π)))))
109	12, 99, 101, 105, 108	syl1111anc 836	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 + (-(⌊‘(𝐴 / π)) · π)) = (𝐴 + -(π · (⌊‘(𝐴 / π)))))
110	12, 100	negsubd 11268	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 + -(π · (⌊‘(𝐴 / π)))) = (𝐴 − (π · (⌊‘(𝐴 / π)))))
111	109, 110	eqtrd 2778	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 + (-(⌊‘(𝐴 / π)) · π)) = (𝐴 − (π · (⌊‘(𝐴 / π)))))
112	111	fveq2d 6760	. . . . . . . . . . . . . . . 16 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (sin‘(𝐴 + (-(⌊‘(𝐴 / π)) · π))) = (sin‘(𝐴 − (π · (⌊‘(𝐴 / π))))))
113	112	fveq2d 6760	. . . . . . . . . . . . . . 15 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (abs‘(sin‘(𝐴 + (-(⌊‘(𝐴 / π)) · π)))) = (abs‘(sin‘(𝐴 − (π · (⌊‘(𝐴 / π)))))))
114	94, 113	eqtrd 2778	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (abs‘(sin‘𝐴)) = (abs‘(sin‘(𝐴 − (π · (⌊‘(𝐴 / π)))))))
115		modval 13519	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ+) → (𝐴 mod π) = (𝐴 − (π · (⌊‘(𝐴 / π)))))
116	115	fveq2d 6760	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ+) → (sin‘(𝐴 mod π)) = (sin‘(𝐴 − (π · (⌊‘(𝐴 / π))))))
117	116	fveq2d 6760	. . . . . . . . . . . . . . . 16 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ+) → (abs‘(sin‘(𝐴 mod π))) = (abs‘(sin‘(𝐴 − (π · (⌊‘(𝐴 / π)))))))
118	3, 117	mpan2 687	. . . . . . . . . . . . . . 15 ⊢ (𝐴 ∈ ℝ → (abs‘(sin‘(𝐴 mod π))) = (abs‘(sin‘(𝐴 − (π · (⌊‘(𝐴 / π)))))))
119	74, 118	syl 17	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (abs‘(sin‘(𝐴 mod π))) = (abs‘(sin‘(𝐴 − (π · (⌊‘(𝐴 / π)))))))
120	114, 119	eqtr4d 2781	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (abs‘(sin‘𝐴)) = (abs‘(sin‘(𝐴 mod π))))
121	27	fveq2d 6760	. . . . . . . . . . . . . . 15 ⊢ ((sin‘𝐴) = 0 → (abs‘(sin‘𝐴)) = (abs‘0))
122		abs0 14925	. . . . . . . . . . . . . . 15 ⊢ (abs‘0) = 0
123	121, 122	eqtrdi 2795	. . . . . . . . . . . . . 14 ⊢ ((sin‘𝐴) = 0 → (abs‘(sin‘𝐴)) = 0)
124	123	adantl 481	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (abs‘(sin‘𝐴)) = 0)
125	120, 124	eqtr3d 2780	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (abs‘(sin‘(𝐴 mod π))) = 0)
126	78, 125	abs00d 15086	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (sin‘(𝐴 mod π)) = 0)
127		notnotb 314	. . . . . . . . . . . . 13 ⊢ ((sin‘(𝐴 mod π)) = 0 ↔ ¬ ¬ (sin‘(𝐴 mod π)) = 0)
128	127	bicomi 223	. . . . . . . . . . . 12 ⊢ (¬ ¬ (sin‘(𝐴 mod π)) = 0 ↔ (sin‘(𝐴 mod π)) = 0)
129		ltne 11002	. . . . . . . . . . . . . . . 16 ⊢ ((0 ∈ ℝ ∧ 0 < (sin‘(𝐴 mod π))) → (sin‘(𝐴 mod π)) ≠ 0)
130	129	neneqd 2947	. . . . . . . . . . . . . . 15 ⊢ ((0 ∈ ℝ ∧ 0 < (sin‘(𝐴 mod π))) → ¬ (sin‘(𝐴 mod π)) = 0)
131	130	expcom 413	. . . . . . . . . . . . . 14 ⊢ (0 < (sin‘(𝐴 mod π)) → (0 ∈ ℝ → ¬ (sin‘(𝐴 mod π)) = 0))
132	80, 131	mpi 20	. . . . . . . . . . . . 13 ⊢ (0 < (sin‘(𝐴 mod π)) → ¬ (sin‘(𝐴 mod π)) = 0)
133	132	con3i 154	. . . . . . . . . . . 12 ⊢ (¬ ¬ (sin‘(𝐴 mod π)) = 0 → ¬ 0 < (sin‘(𝐴 mod π)))
134	128, 133	sylbir 234	. . . . . . . . . . 11 ⊢ ((sin‘(𝐴 mod π)) = 0 → ¬ 0 < (sin‘(𝐴 mod π)))
135	126, 134	syl 17	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → ¬ 0 < (sin‘(𝐴 mod π)))
136		sinq12gt0 25569	. . . . . . . . . 10 ⊢ ((𝐴 mod π) ∈ (0(,)π) → 0 < (sin‘(𝐴 mod π)))
137	135, 136	nsyl 140	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → ¬ (𝐴 mod π) ∈ (0(,)π))
138	80	rexri 10964	. . . . . . . . . . 11 ⊢ 0 ∈ ℝ*
139	1	rexri 10964	. . . . . . . . . . 11 ⊢ π ∈ ℝ*
140		elioo2 13049	. . . . . . . . . . 11 ⊢ ((0 ∈ ℝ* ∧ π ∈ ℝ*) → ((𝐴 mod π) ∈ (0(,)π) ↔ ((𝐴 mod π) ∈ ℝ ∧ 0 < (𝐴 mod π) ∧ (𝐴 mod π) < π)))
141	138, 139, 140	mp2an 688	. . . . . . . . . 10 ⊢ ((𝐴 mod π) ∈ (0(,)π) ↔ ((𝐴 mod π) ∈ ℝ ∧ 0 < (𝐴 mod π) ∧ (𝐴 mod π) < π))
142	141	notbii 319	. . . . . . . . 9 ⊢ (¬ (𝐴 mod π) ∈ (0(,)π) ↔ ¬ ((𝐴 mod π) ∈ ℝ ∧ 0 < (𝐴 mod π) ∧ (𝐴 mod π) < π))
143	137, 142	sylib 217	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → ¬ ((𝐴 mod π) ∈ ℝ ∧ 0 < (𝐴 mod π) ∧ (𝐴 mod π) < π))
144		3anan12 1094	. . . . . . . . 9 ⊢ (((𝐴 mod π) ∈ ℝ ∧ 0 < (𝐴 mod π) ∧ (𝐴 mod π) < π) ↔ (0 < (𝐴 mod π) ∧ ((𝐴 mod π) ∈ ℝ ∧ (𝐴 mod π) < π)))
145	144	notbii 319	. . . . . . . 8 ⊢ (¬ ((𝐴 mod π) ∈ ℝ ∧ 0 < (𝐴 mod π) ∧ (𝐴 mod π) < π) ↔ ¬ (0 < (𝐴 mod π) ∧ ((𝐴 mod π) ∈ ℝ ∧ (𝐴 mod π) < π)))
146	143, 145	sylib 217	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → ¬ (0 < (𝐴 mod π) ∧ ((𝐴 mod π) ∈ ℝ ∧ (𝐴 mod π) < π)))
147		modlt 13528	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ+) → (𝐴 mod π) < π)
148	147	ancoms 458	. . . . . . . . 9 ⊢ ((π ∈ ℝ+ ∧ 𝐴 ∈ ℝ) → (𝐴 mod π) < π)
149	3, 74, 148	sylancr 586	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 mod π) < π)
150	76, 149	jca 511	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → ((𝐴 mod π) ∈ ℝ ∧ (𝐴 mod π) < π))
151		not12an2impnot1 42077	. . . . . . 7 ⊢ ((¬ (0 < (𝐴 mod π) ∧ ((𝐴 mod π) ∈ ℝ ∧ (𝐴 mod π) < π)) ∧ ((𝐴 mod π) ∈ ℝ ∧ (𝐴 mod π) < π)) → ¬ 0 < (𝐴 mod π))
152	146, 150, 151	syl2anc 583	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → ¬ 0 < (𝐴 mod π))
153		modge0 13527	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ+) → 0 ≤ (𝐴 mod π))
154	153	ancoms 458	. . . . . . . 8 ⊢ ((π ∈ ℝ+ ∧ 𝐴 ∈ ℝ) → 0 ≤ (𝐴 mod π))
155	3, 74, 154	sylancr 586	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → 0 ≤ (𝐴 mod π))
156		leloe 10992	. . . . . . . . 9 ⊢ ((0 ∈ ℝ ∧ (𝐴 mod π) ∈ ℝ) → (0 ≤ (𝐴 mod π) ↔ (0 < (𝐴 mod π) ∨ 0 = (𝐴 mod π))))
157	156	biimp3a 1467	. . . . . . . 8 ⊢ ((0 ∈ ℝ ∧ (𝐴 mod π) ∈ ℝ ∧ 0 ≤ (𝐴 mod π)) → (0 < (𝐴 mod π) ∨ 0 = (𝐴 mod π)))
158	157	idiALT 41986	. . . . . . 7 ⊢ ((0 ∈ ℝ ∧ (𝐴 mod π) ∈ ℝ ∧ 0 ≤ (𝐴 mod π)) → (0 < (𝐴 mod π) ∨ 0 = (𝐴 mod π)))
159	80, 76, 155, 158	mp3an2i 1464	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (0 < (𝐴 mod π) ∨ 0 = (𝐴 mod π)))
160		pm2.53 847	. . . . . . . 8 ⊢ ((0 < (𝐴 mod π) ∨ 0 = (𝐴 mod π)) → (¬ 0 < (𝐴 mod π) → 0 = (𝐴 mod π)))
161	160	imp 406	. . . . . . 7 ⊢ (((0 < (𝐴 mod π) ∨ 0 = (𝐴 mod π)) ∧ ¬ 0 < (𝐴 mod π)) → 0 = (𝐴 mod π))
162	161	ancoms 458	. . . . . 6 ⊢ ((¬ 0 < (𝐴 mod π) ∧ (0 < (𝐴 mod π) ∨ 0 = (𝐴 mod π))) → 0 = (𝐴 mod π))
163	152, 159, 162	syl2anc 583	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → 0 = (𝐴 mod π))
164	163	eqcomd 2744	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 mod π) = 0)
165		mod0 13524	. . . . . 6 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ+) → ((𝐴 mod π) = 0 ↔ (𝐴 / π) ∈ ℤ))
166	165	biimp3a 1467	. . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ+ ∧ (𝐴 mod π) = 0) → (𝐴 / π) ∈ ℤ)
167	166	3com12 1121	. . . 4 ⊢ ((π ∈ ℝ+ ∧ 𝐴 ∈ ℝ ∧ (𝐴 mod π) = 0) → (𝐴 / π) ∈ ℤ)
168	3, 74, 164, 167	mp3an2i 1464	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 / π) ∈ ℤ)
169	168	ex 412	. 2 ⊢ (𝐴 ∈ ℂ → ((sin‘𝐴) = 0 → (𝐴 / π) ∈ ℤ))
170	97	a1i 11	. . . . . 6 ⊢ (𝐴 ∈ ℂ → π ∈ ℂ)
171	85	a1i 11	. . . . . 6 ⊢ (𝐴 ∈ ℂ → π ≠ 0)
172	11, 170, 171	divcan1d 11682	. . . . 5 ⊢ (𝐴 ∈ ℂ → ((𝐴 / π) · π) = 𝐴)
173	172	fveq2d 6760	. . . 4 ⊢ (𝐴 ∈ ℂ → (sin‘((𝐴 / π) · π)) = (sin‘𝐴))
174		id 22	. . . . 5 ⊢ ((𝐴 / π) ∈ ℤ → (𝐴 / π) ∈ ℤ)
175		sinkpi 25583	. . . . 5 ⊢ ((𝐴 / π) ∈ ℤ → (sin‘((𝐴 / π) · π)) = 0)
176	174, 175	syl 17	. . . 4 ⊢ ((𝐴 / π) ∈ ℤ → (sin‘((𝐴 / π) · π)) = 0)
177	173, 176	sylan9req 2800	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ (𝐴 / π) ∈ ℤ) → (sin‘𝐴) = 0)
178	177	ex 412	. 2 ⊢ (𝐴 ∈ ℂ → ((𝐴 / π) ∈ ℤ → (sin‘𝐴) = 0))
179	169, 178	impbid 211	1 ⊢ (𝐴 ∈ ℂ → ((sin‘𝐴) = 0 ↔ (𝐴 / π) ∈ ℤ))

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 205   ∧ wa 395   ∨ wo 843   ∧ w3a 1085   = wceq 1539   ∈ wcel 2108   ≠ wne 2942   class class class wbr 5070  ‘cfv 6418  (class class class)co 7255  ℂcc 10800  ℝcr 10801  0cc0 10802  1c1 10803  ici 10804   + caddc 10805   · cmul 10807  ℝ^*cxr 10939   < clt 10940   ≤ cle 10941   − cmin 11135  -cneg 11136   / cdiv 11562  2c2 11958  ℤcz 12249  ℝ⁺crp 12659  (,)cioo 13008  ⌊cfl 13438   mod cmo 13517  abscabs 14873  expce 15699  sincsin 15701  πcpi 15704

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-10 2139  ax-11 2156  ax-12 2173  ax-ext 2709  ax-rep 5205  ax-sep 5218  ax-nul 5225  ax-pow 5283  ax-pr 5347  ax-un 7566  ax-inf2 9329  ax-cnex 10858  ax-resscn 10859  ax-1cn 10860  ax-icn 10861  ax-addcl 10862  ax-addrcl 10863  ax-mulcl 10864  ax-mulrcl 10865  ax-mulcom 10866  ax-addass 10867  ax-mulass 10868  ax-distr 10869  ax-i2m1 10870  ax-1ne0 10871  ax-1rid 10872  ax-rnegex 10873  ax-rrecex 10874  ax-cnre 10875  ax-pre-lttri 10876  ax-pre-lttrn 10877  ax-pre-ltadd 10878  ax-pre-mulgt0 10879  ax-pre-sup 10880  ax-addf 10881  ax-mulf 10882

This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3or 1086  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1784  df-nf 1788  df-sb 2069  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2817  df-nfc 2888  df-ne 2943  df-nel 3049  df-ral 3068  df-rex 3069  df-reu 3070  df-rmo 3071  df-rab 3072  df-v 3424  df-sbc 3712  df-csb 3829  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-pss 3902  df-nul 4254  df-if 4457  df-pw 4532  df-sn 4559  df-pr 4561  df-tp 4563  df-op 4565  df-uni 4837  df-int 4877  df-iun 4923  df-iin 4924  df-br 5071  df-opab 5133  df-mpt 5154  df-tr 5188  df-id 5480  df-eprel 5486  df-po 5494  df-so 5495  df-fr 5535  df-se 5536  df-we 5537  df-xp 5586  df-rel 5587  df-cnv 5588  df-co 5589  df-dm 5590  df-rn 5591  df-res 5592  df-ima 5593  df-pred 6191  df-ord 6254  df-on 6255  df-lim 6256  df-suc 6257  df-iota 6376  df-fun 6420  df-fn 6421  df-f 6422  df-f1 6423  df-fo 6424  df-f1o 6425  df-fv 6426  df-isom 6427  df-riota 7212  df-ov 7258  df-oprab 7259  df-mpo 7260  df-of 7511  df-om 7688  df-1st 7804  df-2nd 7805  df-supp 7949  df-frecs 8068  df-wrecs 8099  df-recs 8173  df-rdg 8212  df-1o 8267  df-2o 8268  df-er 8456  df-map 8575  df-pm 8576  df-ixp 8644  df-en 8692  df-dom 8693  df-sdom 8694  df-fin 8695  df-fsupp 9059  df-fi 9100  df-sup 9131  df-inf 9132  df-oi 9199  df-card 9628  df-pnf 10942  df-mnf 10943  df-xr 10944  df-ltxr 10945  df-le 10946  df-sub 11137  df-neg 11138  df-div 11563  df-nn 11904  df-2 11966  df-3 11967  df-4 11968  df-5 11969  df-6 11970  df-7 11971  df-8 11972  df-9 11973  df-n0 12164  df-z 12250  df-dec 12367  df-uz 12512  df-q 12618  df-rp 12660  df-xneg 12777  df-xadd 12778  df-xmul 12779  df-ioo 13012  df-ioc 13013  df-ico 13014  df-icc 13015  df-fz 13169  df-fzo 13312  df-fl 13440  df-mod 13518  df-seq 13650  df-exp 13711  df-fac 13916  df-bc 13945  df-hash 13973  df-shft 14706  df-cj 14738  df-re 14739  df-im 14740  df-sqrt 14874  df-abs 14875  df-limsup 15108  df-clim 15125  df-rlim 15126  df-sum 15326  df-ef 15705  df-sin 15707  df-cos 15708  df-pi 15710  df-struct 16776  df-sets 16793  df-slot 16811  df-ndx 16823  df-base 16841  df-ress 16868  df-plusg 16901  df-mulr 16902  df-starv 16903  df-sca 16904  df-vsca 16905  df-ip 16906  df-tset 16907  df-ple 16908  df-ds 16910  df-unif 16911  df-hom 16912  df-cco 16913  df-rest 17050  df-topn 17051  df-0g 17069  df-gsum 17070  df-topgen 17071  df-pt 17072  df-prds 17075  df-xrs 17130  df-qtop 17135  df-imas 17136  df-xps 17138  df-mre 17212  df-mrc 17213  df-acs 17215  df-mgm 18241  df-sgrp 18290  df-mnd 18301  df-submnd 18346  df-mulg 18616  df-cntz 18838  df-cmn 19303  df-psmet 20502  df-xmet 20503  df-met 20504  df-bl 20505  df-mopn 20506  df-fbas 20507  df-fg 20508  df-cnfld 20511  df-top 21951  df-topon 21968  df-topsp 21990  df-bases 22004  df-cld 22078  df-ntr 22079  df-cls 22080  df-nei 22157  df-lp 22195  df-perf 22196  df-cn 22286  df-cnp 22287  df-haus 22374  df-tx 22621  df-hmeo 22814  df-fil 22905  df-fm 22997  df-flim 22998  df-flf 22999  df-xms 23381  df-ms 23382  df-tms 23383  df-cncf 23947  df-limc 24935  df-dv 24936

This theorem is referenced by: (None)