sineq0 - Metamath Proof Explorer

	Metamath Proof Explorer		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > sineq0		Structured version Visualization version GIF version

Theorem sineq0 26409

Description: A complex number whose sine is zero is an integer multiple of π. (Contributed by NM, 17-Aug-2008.) (Revised by Mario Carneiro, 10-May-2014.)

**Assertion**
Ref	Expression
sineq0	⊢ (𝐴 ∈ ℂ → ((sin‘𝐴) = 0 ↔ (𝐴 / π) ∈ ℤ))

**Proof of Theorem sineq0**
Step	Hyp	Ref	Expression
1		sinval 16070	. . . . . . . . . . . . . . . . 17 ⊢ (𝐴 ∈ ℂ → (sin‘𝐴) = (((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) / (2 · i)))
2	1	eqeq1d 2728	. . . . . . . . . . . . . . . 16 ⊢ (𝐴 ∈ ℂ → ((sin‘𝐴) = 0 ↔ (((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) / (2 · i)) = 0))
3		ax-icn 11168	. . . . . . . . . . . . . . . . . . . 20 ⊢ i ∈ ℂ
4		mulcl 11193	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((i ∈ ℂ ∧ 𝐴 ∈ ℂ) → (i · 𝐴) ∈ ℂ)
5	3, 4	mpan 687	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝐴 ∈ ℂ → (i · 𝐴) ∈ ℂ)
6		efcl 16030	. . . . . . . . . . . . . . . . . . 19 ⊢ ((i · 𝐴) ∈ ℂ → (exp‘(i · 𝐴)) ∈ ℂ)
7	5, 6	syl 17	. . . . . . . . . . . . . . . . . 18 ⊢ (𝐴 ∈ ℂ → (exp‘(i · 𝐴)) ∈ ℂ)
8		negicn 11462	. . . . . . . . . . . . . . . . . . . 20 ⊢ -i ∈ ℂ
9		mulcl 11193	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((-i ∈ ℂ ∧ 𝐴 ∈ ℂ) → (-i · 𝐴) ∈ ℂ)
10	8, 9	mpan 687	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝐴 ∈ ℂ → (-i · 𝐴) ∈ ℂ)
11		efcl 16030	. . . . . . . . . . . . . . . . . . 19 ⊢ ((-i · 𝐴) ∈ ℂ → (exp‘(-i · 𝐴)) ∈ ℂ)
12	10, 11	syl 17	. . . . . . . . . . . . . . . . . 18 ⊢ (𝐴 ∈ ℂ → (exp‘(-i · 𝐴)) ∈ ℂ)
13	7, 12	subcld 11572	. . . . . . . . . . . . . . . . 17 ⊢ (𝐴 ∈ ℂ → ((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) ∈ ℂ)
14		2mulicn 12436	. . . . . . . . . . . . . . . . . 18 ⊢ (2 · i) ∈ ℂ
15		2muline0 12437	. . . . . . . . . . . . . . . . . 18 ⊢ (2 · i) ≠ 0
16		diveq0 11883	. . . . . . . . . . . . . . . . . 18 ⊢ ((((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) ∈ ℂ ∧ (2 · i) ∈ ℂ ∧ (2 · i) ≠ 0) → ((((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) / (2 · i)) = 0 ↔ ((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) = 0))
17	14, 15, 16	mp3an23 1449	. . . . . . . . . . . . . . . . 17 ⊢ (((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) ∈ ℂ → ((((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) / (2 · i)) = 0 ↔ ((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) = 0))
18	13, 17	syl 17	. . . . . . . . . . . . . . . 16 ⊢ (𝐴 ∈ ℂ → ((((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) / (2 · i)) = 0 ↔ ((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) = 0))
19	7, 12	subeq0ad 11582	. . . . . . . . . . . . . . . 16 ⊢ (𝐴 ∈ ℂ → (((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) = 0 ↔ (exp‘(i · 𝐴)) = (exp‘(-i · 𝐴))))
20	2, 18, 19	3bitrd 305	. . . . . . . . . . . . . . 15 ⊢ (𝐴 ∈ ℂ → ((sin‘𝐴) = 0 ↔ (exp‘(i · 𝐴)) = (exp‘(-i · 𝐴))))
21		oveq2 7412	. . . . . . . . . . . . . . . 16 ⊢ ((exp‘(i · 𝐴)) = (exp‘(-i · 𝐴)) → ((exp‘(i · 𝐴)) · (exp‘(i · 𝐴))) = ((exp‘(i · 𝐴)) · (exp‘(-i · 𝐴))))
22		2cn 12288	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ 2 ∈ ℂ
23		mul12 11380	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((i ∈ ℂ ∧ 2 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (i · (2 · 𝐴)) = (2 · (i · 𝐴)))
24	3, 22, 23	mp3an12 1447	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝐴 ∈ ℂ → (i · (2 · 𝐴)) = (2 · (i · 𝐴)))
25	5	2timesd 12456	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝐴 ∈ ℂ → (2 · (i · 𝐴)) = ((i · 𝐴) + (i · 𝐴)))
26	24, 25	eqtrd 2766	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝐴 ∈ ℂ → (i · (2 · 𝐴)) = ((i · 𝐴) + (i · 𝐴)))
27	26	fveq2d 6888	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝐴 ∈ ℂ → (exp‘(i · (2 · 𝐴))) = (exp‘((i · 𝐴) + (i · 𝐴))))
28		efadd 16042	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((i · 𝐴) ∈ ℂ ∧ (i · 𝐴) ∈ ℂ) → (exp‘((i · 𝐴) + (i · 𝐴))) = ((exp‘(i · 𝐴)) · (exp‘(i · 𝐴))))
29	5, 5, 28	syl2anc 583	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝐴 ∈ ℂ → (exp‘((i · 𝐴) + (i · 𝐴))) = ((exp‘(i · 𝐴)) · (exp‘(i · 𝐴))))
30	27, 29	eqtr2d 2767	. . . . . . . . . . . . . . . . . 18 ⊢ (𝐴 ∈ ℂ → ((exp‘(i · 𝐴)) · (exp‘(i · 𝐴))) = (exp‘(i · (2 · 𝐴))))
31		efadd 16042	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((i · 𝐴) ∈ ℂ ∧ (-i · 𝐴) ∈ ℂ) → (exp‘((i · 𝐴) + (-i · 𝐴))) = ((exp‘(i · 𝐴)) · (exp‘(-i · 𝐴))))
32	5, 10, 31	syl2anc 583	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝐴 ∈ ℂ → (exp‘((i · 𝐴) + (-i · 𝐴))) = ((exp‘(i · 𝐴)) · (exp‘(-i · 𝐴))))
33	3	negidi 11530	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (i + -i) = 0
34	33	oveq1i 7414	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((i + -i) · 𝐴) = (0 · 𝐴)
35		adddir 11206	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((i ∈ ℂ ∧ -i ∈ ℂ ∧ 𝐴 ∈ ℂ) → ((i + -i) · 𝐴) = ((i · 𝐴) + (-i · 𝐴)))
36	3, 8, 35	mp3an12 1447	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝐴 ∈ ℂ → ((i + -i) · 𝐴) = ((i · 𝐴) + (-i · 𝐴)))
37		mul02 11393	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝐴 ∈ ℂ → (0 · 𝐴) = 0)
38	34, 36, 37	3eqtr3a 2790	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝐴 ∈ ℂ → ((i · 𝐴) + (-i · 𝐴)) = 0)
39	38	fveq2d 6888	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝐴 ∈ ℂ → (exp‘((i · 𝐴) + (-i · 𝐴))) = (exp‘0))
40		ef0 16039	. . . . . . . . . . . . . . . . . . . 20 ⊢ (exp‘0) = 1
41	39, 40	eqtrdi 2782	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝐴 ∈ ℂ → (exp‘((i · 𝐴) + (-i · 𝐴))) = 1)
42	32, 41	eqtr3d 2768	. . . . . . . . . . . . . . . . . 18 ⊢ (𝐴 ∈ ℂ → ((exp‘(i · 𝐴)) · (exp‘(-i · 𝐴))) = 1)
43	30, 42	eqeq12d 2742	. . . . . . . . . . . . . . . . 17 ⊢ (𝐴 ∈ ℂ → (((exp‘(i · 𝐴)) · (exp‘(i · 𝐴))) = ((exp‘(i · 𝐴)) · (exp‘(-i · 𝐴))) ↔ (exp‘(i · (2 · 𝐴))) = 1))
44		fveq2 6884	. . . . . . . . . . . . . . . . 17 ⊢ ((exp‘(i · (2 · 𝐴))) = 1 → (abs‘(exp‘(i · (2 · 𝐴)))) = (abs‘1))
45	43, 44	syl6bi 253	. . . . . . . . . . . . . . . 16 ⊢ (𝐴 ∈ ℂ → (((exp‘(i · 𝐴)) · (exp‘(i · 𝐴))) = ((exp‘(i · 𝐴)) · (exp‘(-i · 𝐴))) → (abs‘(exp‘(i · (2 · 𝐴)))) = (abs‘1)))
46	21, 45	syl5 34	. . . . . . . . . . . . . . 15 ⊢ (𝐴 ∈ ℂ → ((exp‘(i · 𝐴)) = (exp‘(-i · 𝐴)) → (abs‘(exp‘(i · (2 · 𝐴)))) = (abs‘1)))
47	20, 46	sylbid 239	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∈ ℂ → ((sin‘𝐴) = 0 → (abs‘(exp‘(i · (2 · 𝐴)))) = (abs‘1)))
48		abs1 15248	. . . . . . . . . . . . . . . 16 ⊢ (abs‘1) = 1
49	48	eqeq2i 2739	. . . . . . . . . . . . . . 15 ⊢ ((abs‘(exp‘(i · (2 · 𝐴)))) = (abs‘1) ↔ (abs‘(exp‘(i · (2 · 𝐴)))) = 1)
50		2re 12287	. . . . . . . . . . . . . . . . 17 ⊢ 2 ∈ ℝ
51		2ne0 12317	. . . . . . . . . . . . . . . . 17 ⊢ 2 ≠ 0
52		mulre 15072	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ ℂ ∧ 2 ∈ ℝ ∧ 2 ≠ 0) → (𝐴 ∈ ℝ ↔ (2 · 𝐴) ∈ ℝ))
53	50, 51, 52	mp3an23 1449	. . . . . . . . . . . . . . . 16 ⊢ (𝐴 ∈ ℂ → (𝐴 ∈ ℝ ↔ (2 · 𝐴) ∈ ℝ))
54		mulcl 11193	. . . . . . . . . . . . . . . . . 18 ⊢ ((2 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (2 · 𝐴) ∈ ℂ)
55	22, 54	mpan 687	. . . . . . . . . . . . . . . . 17 ⊢ (𝐴 ∈ ℂ → (2 · 𝐴) ∈ ℂ)
56		absefib 16146	. . . . . . . . . . . . . . . . 17 ⊢ ((2 · 𝐴) ∈ ℂ → ((2 · 𝐴) ∈ ℝ ↔ (abs‘(exp‘(i · (2 · 𝐴)))) = 1))
57	55, 56	syl 17	. . . . . . . . . . . . . . . 16 ⊢ (𝐴 ∈ ℂ → ((2 · 𝐴) ∈ ℝ ↔ (abs‘(exp‘(i · (2 · 𝐴)))) = 1))
58	53, 57	bitr2d 280	. . . . . . . . . . . . . . 15 ⊢ (𝐴 ∈ ℂ → ((abs‘(exp‘(i · (2 · 𝐴)))) = 1 ↔ 𝐴 ∈ ℝ))
59	49, 58	bitrid 283	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∈ ℂ → ((abs‘(exp‘(i · (2 · 𝐴)))) = (abs‘1) ↔ 𝐴 ∈ ℝ))
60	47, 59	sylibd 238	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ ℂ → ((sin‘𝐴) = 0 → 𝐴 ∈ ℝ))
61	60	imp 406	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → 𝐴 ∈ ℝ)
62		pirp 26347	. . . . . . . . . . . 12 ⊢ π ∈ ℝ⁺
63		modval 13839	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ⁺) → (𝐴 mod π) = (𝐴 − (π · (⌊‘(𝐴 / π)))))
64	61, 62, 63	sylancl 585	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 mod π) = (𝐴 − (π · (⌊‘(𝐴 / π)))))
65		picn 26345	. . . . . . . . . . . . 13 ⊢ π ∈ ℂ
66		pire 26344	. . . . . . . . . . . . . . . . 17 ⊢ π ∈ ℝ
67		pipos 26346	. . . . . . . . . . . . . . . . . 18 ⊢ 0 < π
68	66, 67	gt0ne0ii 11751	. . . . . . . . . . . . . . . . 17 ⊢ π ≠ 0
69		redivcl 11934	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ ∧ π ≠ 0) → (𝐴 / π) ∈ ℝ)
70	66, 68, 69	mp3an23 1449	. . . . . . . . . . . . . . . 16 ⊢ (𝐴 ∈ ℝ → (𝐴 / π) ∈ ℝ)
71	61, 70	syl 17	. . . . . . . . . . . . . . 15 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 / π) ∈ ℝ)
72	71	flcld 13766	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (⌊‘(𝐴 / π)) ∈ ℤ)
73	72	zcnd 12668	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (⌊‘(𝐴 / π)) ∈ ℂ)
74		mulcl 11193	. . . . . . . . . . . . 13 ⊢ ((π ∈ ℂ ∧ (⌊‘(𝐴 / π)) ∈ ℂ) → (π · (⌊‘(𝐴 / π))) ∈ ℂ)
75	65, 73, 74	sylancr 586	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (π · (⌊‘(𝐴 / π))) ∈ ℂ)
76		negsub 11509	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ (π · (⌊‘(𝐴 / π))) ∈ ℂ) → (𝐴 + -(π · (⌊‘(𝐴 / π)))) = (𝐴 − (π · (⌊‘(𝐴 / π)))))
77	75, 76	syldan 590	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 + -(π · (⌊‘(𝐴 / π)))) = (𝐴 − (π · (⌊‘(𝐴 / π)))))
78		mulcom 11195	. . . . . . . . . . . . . . 15 ⊢ ((π ∈ ℂ ∧ (⌊‘(𝐴 / π)) ∈ ℂ) → (π · (⌊‘(𝐴 / π))) = ((⌊‘(𝐴 / π)) · π))
79	65, 73, 78	sylancr 586	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (π · (⌊‘(𝐴 / π))) = ((⌊‘(𝐴 / π)) · π))
80	79	negeqd 11455	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → -(π · (⌊‘(𝐴 / π))) = -((⌊‘(𝐴 / π)) · π))
81		mulneg1 11651	. . . . . . . . . . . . . 14 ⊢ (((⌊‘(𝐴 / π)) ∈ ℂ ∧ π ∈ ℂ) → (-(⌊‘(𝐴 / π)) · π) = -((⌊‘(𝐴 / π)) · π))
82	73, 65, 81	sylancl 585	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (-(⌊‘(𝐴 / π)) · π) = -((⌊‘(𝐴 / π)) · π))
83	80, 82	eqtr4d 2769	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → -(π · (⌊‘(𝐴 / π))) = (-(⌊‘(𝐴 / π)) · π))
84	83	oveq2d 7420	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 + -(π · (⌊‘(𝐴 / π)))) = (𝐴 + (-(⌊‘(𝐴 / π)) · π)))
85	64, 77, 84	3eqtr2d 2772	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 mod π) = (𝐴 + (-(⌊‘(𝐴 / π)) · π)))
86	85	fveq2d 6888	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (sin‘(𝐴 mod π)) = (sin‘(𝐴 + (-(⌊‘(𝐴 / π)) · π))))
87	86	fveq2d 6888	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (abs‘(sin‘(𝐴 mod π))) = (abs‘(sin‘(𝐴 + (-(⌊‘(𝐴 / π)) · π)))))
88	72	znegcld 12669	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → -(⌊‘(𝐴 / π)) ∈ ℤ)
89		abssinper 26406	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ -(⌊‘(𝐴 / π)) ∈ ℤ) → (abs‘(sin‘(𝐴 + (-(⌊‘(𝐴 / π)) · π)))) = (abs‘(sin‘𝐴)))
90	88, 89	syldan 590	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (abs‘(sin‘(𝐴 + (-(⌊‘(𝐴 / π)) · π)))) = (abs‘(sin‘𝐴)))
91		simpr 484	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (sin‘𝐴) = 0)
92	91	fveq2d 6888	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (abs‘(sin‘𝐴)) = (abs‘0))
93	87, 90, 92	3eqtrd 2770	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (abs‘(sin‘(𝐴 mod π))) = (abs‘0))
94		abs0 15236	. . . . . . 7 ⊢ (abs‘0) = 0
95	93, 94	eqtrdi 2782	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (abs‘(sin‘(𝐴 mod π))) = 0)
96		modcl 13841	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ⁺) → (𝐴 mod π) ∈ ℝ)
97	61, 62, 96	sylancl 585	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 mod π) ∈ ℝ)
98		modlt 13848	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ⁺) → (𝐴 mod π) < π)
99	61, 62, 98	sylancl 585	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 mod π) < π)
100	97, 99	jca 511	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → ((𝐴 mod π) ∈ ℝ ∧ (𝐴 mod π) < π))
101	100	biantrurd 532	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (0 < (𝐴 mod π) ↔ (((𝐴 mod π) ∈ ℝ ∧ (𝐴 mod π) < π) ∧ 0 < (𝐴 mod π))))
102		0re 11217	. . . . . . . . . . . 12 ⊢ 0 ∈ ℝ
103		rexr 11261	. . . . . . . . . . . . 13 ⊢ (0 ∈ ℝ → 0 ∈ ℝ^*)
104		rexr 11261	. . . . . . . . . . . . 13 ⊢ (π ∈ ℝ → π ∈ ℝ^*)
105		elioo2 13368	. . . . . . . . . . . . 13 ⊢ ((0 ∈ ℝ^* ∧ π ∈ ℝ^*) → ((𝐴 mod π) ∈ (0(,)π) ↔ ((𝐴 mod π) ∈ ℝ ∧ 0 < (𝐴 mod π) ∧ (𝐴 mod π) < π)))
106	103, 104, 105	syl2an 595	. . . . . . . . . . . 12 ⊢ ((0 ∈ ℝ ∧ π ∈ ℝ) → ((𝐴 mod π) ∈ (0(,)π) ↔ ((𝐴 mod π) ∈ ℝ ∧ 0 < (𝐴 mod π) ∧ (𝐴 mod π) < π)))
107	102, 66, 106	mp2an 689	. . . . . . . . . . 11 ⊢ ((𝐴 mod π) ∈ (0(,)π) ↔ ((𝐴 mod π) ∈ ℝ ∧ 0 < (𝐴 mod π) ∧ (𝐴 mod π) < π))
108		3anan32 1094	. . . . . . . . . . 11 ⊢ (((𝐴 mod π) ∈ ℝ ∧ 0 < (𝐴 mod π) ∧ (𝐴 mod π) < π) ↔ (((𝐴 mod π) ∈ ℝ ∧ (𝐴 mod π) < π) ∧ 0 < (𝐴 mod π)))
109	107, 108	bitri 275	. . . . . . . . . 10 ⊢ ((𝐴 mod π) ∈ (0(,)π) ↔ (((𝐴 mod π) ∈ ℝ ∧ (𝐴 mod π) < π) ∧ 0 < (𝐴 mod π)))
110	101, 109	bitr4di 289	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (0 < (𝐴 mod π) ↔ (𝐴 mod π) ∈ (0(,)π)))
111		sinq12gt0 26393	. . . . . . . . . 10 ⊢ ((𝐴 mod π) ∈ (0(,)π) → 0 < (sin‘(𝐴 mod π)))
112		elioore 13357	. . . . . . . . . . . 12 ⊢ ((𝐴 mod π) ∈ (0(,)π) → (𝐴 mod π) ∈ ℝ)
113	112	resincld 16091	. . . . . . . . . . 11 ⊢ ((𝐴 mod π) ∈ (0(,)π) → (sin‘(𝐴 mod π)) ∈ ℝ)
114		ltle 11303	. . . . . . . . . . . . 13 ⊢ ((0 ∈ ℝ ∧ (sin‘(𝐴 mod π)) ∈ ℝ) → (0 < (sin‘(𝐴 mod π)) → 0 ≤ (sin‘(𝐴 mod π))))
115	102, 113, 114	sylancr 586	. . . . . . . . . . . 12 ⊢ ((𝐴 mod π) ∈ (0(,)π) → (0 < (sin‘(𝐴 mod π)) → 0 ≤ (sin‘(𝐴 mod π))))
116	111, 115	mpd 15	. . . . . . . . . . 11 ⊢ ((𝐴 mod π) ∈ (0(,)π) → 0 ≤ (sin‘(𝐴 mod π)))
117	113, 116	absidd 15373	. . . . . . . . . 10 ⊢ ((𝐴 mod π) ∈ (0(,)π) → (abs‘(sin‘(𝐴 mod π))) = (sin‘(𝐴 mod π)))
118	111, 117	breqtrrd 5169	. . . . . . . . 9 ⊢ ((𝐴 mod π) ∈ (0(,)π) → 0 < (abs‘(sin‘(𝐴 mod π))))
119	110, 118	syl6bi 253	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (0 < (𝐴 mod π) → 0 < (abs‘(sin‘(𝐴 mod π)))))
120		ltne 11312	. . . . . . . . 9 ⊢ ((0 ∈ ℝ ∧ 0 < (abs‘(sin‘(𝐴 mod π)))) → (abs‘(sin‘(𝐴 mod π))) ≠ 0)
121	102, 120	mpan 687	. . . . . . . 8 ⊢ (0 < (abs‘(sin‘(𝐴 mod π))) → (abs‘(sin‘(𝐴 mod π))) ≠ 0)
122	119, 121	syl6 35	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (0 < (𝐴 mod π) → (abs‘(sin‘(𝐴 mod π))) ≠ 0))
123	122	necon2bd 2950	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → ((abs‘(sin‘(𝐴 mod π))) = 0 → ¬ 0 < (𝐴 mod π)))
124	95, 123	mpd 15	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → ¬ 0 < (𝐴 mod π))
125		modge0 13847	. . . . . . . 8 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ⁺) → 0 ≤ (𝐴 mod π))
126	61, 62, 125	sylancl 585	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → 0 ≤ (𝐴 mod π))
127		leloe 11301	. . . . . . . 8 ⊢ ((0 ∈ ℝ ∧ (𝐴 mod π) ∈ ℝ) → (0 ≤ (𝐴 mod π) ↔ (0 < (𝐴 mod π) ∨ 0 = (𝐴 mod π))))
128	102, 97, 127	sylancr 586	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (0 ≤ (𝐴 mod π) ↔ (0 < (𝐴 mod π) ∨ 0 = (𝐴 mod π))))
129	126, 128	mpbid 231	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (0 < (𝐴 mod π) ∨ 0 = (𝐴 mod π)))
130	129	ord 861	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (¬ 0 < (𝐴 mod π) → 0 = (𝐴 mod π)))
131	124, 130	mpd 15	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → 0 = (𝐴 mod π))
132	131	eqcomd 2732	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 mod π) = 0)
133		mod0 13844	. . . 4 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ⁺) → ((𝐴 mod π) = 0 ↔ (𝐴 / π) ∈ ℤ))
134	61, 62, 133	sylancl 585	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → ((𝐴 mod π) = 0 ↔ (𝐴 / π) ∈ ℤ))
135	132, 134	mpbid 231	. 2 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 / π) ∈ ℤ)
136		divcan1 11882	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ π ∈ ℂ ∧ π ≠ 0) → ((𝐴 / π) · π) = 𝐴)
137	65, 68, 136	mp3an23 1449	. . . 4 ⊢ (𝐴 ∈ ℂ → ((𝐴 / π) · π) = 𝐴)
138	137	fveq2d 6888	. . 3 ⊢ (𝐴 ∈ ℂ → (sin‘((𝐴 / π) · π)) = (sin‘𝐴))
139		sinkpi 26407	. . 3 ⊢ ((𝐴 / π) ∈ ℤ → (sin‘((𝐴 / π) · π)) = 0)
140	138, 139	sylan9req 2787	. 2 ⊢ ((𝐴 ∈ ℂ ∧ (𝐴 / π) ∈ ℤ) → (sin‘𝐴) = 0)
141	135, 140	impbida 798	1 ⊢ (𝐴 ∈ ℂ → ((sin‘𝐴) = 0 ↔ (𝐴 / π) ∈ ℤ))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 395 ∨ wo 844 ∧ w3a 1084 = wceq 1533 ∈ wcel 2098 ≠ wne 2934 class class class wbr 5141 ‘cfv 6536 (class class class)co 7404 ℂcc 11107 ℝcr 11108 0cc0 11109 1c1 11110 ici 11111 + caddc 11112 · cmul 11114 ℝ^*cxr 11248 < clt 11249 ≤ cle 11250 − cmin 11445 -cneg 11446 / cdiv 11872 2c2 12268 ℤcz 12559 ℝ⁺crp 12977 (,)cioo 13327 ⌊cfl 13758 mod cmo 13837 abscabs 15185 expce 16009 sincsin 16011 πcpi 16014

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2697 ax-rep 5278 ax-sep 5292 ax-nul 5299 ax-pow 5356 ax-pr 5420 ax-un 7721 ax-inf2 9635 ax-cnex 11165 ax-resscn 11166 ax-1cn 11167 ax-icn 11168 ax-addcl 11169 ax-addrcl 11170 ax-mulcl 11171 ax-mulrcl 11172 ax-mulcom 11173 ax-addass 11174 ax-mulass 11175 ax-distr 11176 ax-i2m1 11177 ax-1ne0 11178 ax-1rid 11179 ax-rnegex 11180 ax-rrecex 11181 ax-cnre 11182 ax-pre-lttri 11183 ax-pre-lttrn 11184 ax-pre-ltadd 11185 ax-pre-mulgt0 11186 ax-pre-sup 11187 ax-addf 11188

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-nel 3041 df-ral 3056 df-rex 3065 df-rmo 3370 df-reu 3371 df-rab 3427 df-v 3470 df-sbc 3773 df-csb 3889 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-pss 3962 df-nul 4318 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-tp 4628 df-op 4630 df-uni 4903 df-int 4944 df-iun 4992 df-iin 4993 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-se 5625 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6293 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6488 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-isom 6545 df-riota 7360 df-ov 7407 df-oprab 7408 df-mpo 7409 df-of 7666 df-om 7852 df-1st 7971 df-2nd 7972 df-supp 8144 df-frecs 8264 df-wrecs 8295 df-recs 8369 df-rdg 8408 df-1o 8464 df-2o 8465 df-er 8702 df-map 8821 df-pm 8822 df-ixp 8891 df-en 8939 df-dom 8940 df-sdom 8941 df-fin 8942 df-fsupp 9361 df-fi 9405 df-sup 9436 df-inf 9437 df-oi 9504 df-card 9933 df-pnf 11251 df-mnf 11252 df-xr 11253 df-ltxr 11254 df-le 11255 df-sub 11447 df-neg 11448 df-div 11873 df-nn 12214 df-2 12276 df-3 12277 df-4 12278 df-5 12279 df-6 12280 df-7 12281 df-8 12282 df-9 12283 df-n0 12474 df-z 12560 df-dec 12679 df-uz 12824 df-q 12934 df-rp 12978 df-xneg 13095 df-xadd 13096 df-xmul 13097 df-ioo 13331 df-ioc 13332 df-ico 13333 df-icc 13334 df-fz 13488 df-fzo 13631 df-fl 13760 df-mod 13838 df-seq 13970 df-exp 14031 df-fac 14237 df-bc 14266 df-hash 14294 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 17087 df-sets 17104 df-slot 17122 df-ndx 17134 df-base 17152 df-ress 17181 df-plusg 17217 df-mulr 17218 df-starv 17219 df-sca 17220 df-vsca 17221 df-ip 17222 df-tset 17223 df-ple 17224 df-ds 17226 df-unif 17227 df-hom 17228 df-cco 17229 df-rest 17375 df-topn 17376 df-0g 17394 df-gsum 17395 df-topgen 17396 df-pt 17397 df-prds 17400 df-xrs 17455 df-qtop 17460 df-imas 17461 df-xps 17463 df-mre 17537 df-mrc 17538 df-acs 17540 df-mgm 18571 df-sgrp 18650 df-mnd 18666 df-submnd 18712 df-mulg 18994 df-cntz 19231 df-cmn 19700 df-psmet 21228 df-xmet 21229 df-met 21230 df-bl 21231 df-mopn 21232 df-fbas 21233 df-fg 21234 df-cnfld 21237 df-top 22747 df-topon 22764 df-topsp 22786 df-bases 22800 df-cld 22874 df-ntr 22875 df-cls 22876 df-nei 22953 df-lp 22991 df-perf 22992 df-cn 23082 df-cnp 23083 df-haus 23170 df-tx 23417 df-hmeo 23610 df-fil 23701 df-fm 23793 df-flim 23794 df-flf 23795 df-xms 24177 df-ms 24178 df-tms 24179 df-cncf 24749 df-limc 25746 df-dv 25747

This theorem is referenced by: coseq1 26410 efeq1 26413 cosne0 26414 logf1o2 26535 coseq0 45133 sinaover2ne0 45137 dirker2re 45361 dirkerdenne0 45362 dirkertrigeqlem3 45369 dirkertrigeq 45370 dirkercncflem1 45372 dirkercncflem2 45373 dirkercncflem4 45375 fourierdlem103 45478 fourierdlem104 45479

W3C validator