sineq0ALT - Mathbox for Alan Sare

	Mathbox for Alan Sare		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > Mathboxes > sineq0ALT		Structured version Visualization version GIF version

Theorem sineq0ALT 43698

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 43698. The Virtual Deduction proof is based on Mario Carneiro's revision of Norm Megill's proof of sineq0 26033. 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 26033 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 25968	. . . . 5 ⊢ π ∈ ℝ
2		pipos 25970	. . . . 5 ⊢ 0 < π
3	1, 2	elrpii 12977	. . . 4 ⊢ π ∈ ℝ⁺
4		2ne0 12316	. . . . . 6 ⊢ 2 ≠ 0
5	4	a1i 11	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → 2 ≠ 0)
6		2cn 12287	. . . . . . 7 ⊢ 2 ∈ ℂ
7		2re 12286	. . . . . . . 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 482	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → 𝐴 ∈ ℂ)
13	6	a1i 11	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → 2 ∈ ℂ)
14	13, 11	mulcld 11234	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (2 · 𝐴) ∈ ℂ)
15		ax-icn 11169	. . . . . . . . . . . . . . 15 ⊢ i ∈ ℂ
16	15	a1i 11	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∈ ℂ → i ∈ ℂ)
17	13, 16, 11	mul12d 11423	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ ℂ → (2 · (i · 𝐴)) = (i · (2 · 𝐴)))
18	16, 11	mulcld 11234	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∈ ℂ → (i · 𝐴) ∈ ℂ)
19	18	2timesd 12455	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ ℂ → (2 · (i · 𝐴)) = ((i · 𝐴) + (i · 𝐴)))
20	17, 19	eqtr3d 2775	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ ℂ → (i · (2 · 𝐴)) = ((i · 𝐴) + (i · 𝐴)))
21	20	fveq2d 6896	. . . . . . . . . . 11 ⊢ (𝐴 ∈ ℂ → (exp‘(i · (2 · 𝐴))) = (exp‘((i · 𝐴) + (i · 𝐴))))
22		efadd 16037	. . . . . . . . . . . 12 ⊢ (((i · 𝐴) ∈ ℂ ∧ (i · 𝐴) ∈ ℂ) → (exp‘((i · 𝐴) + (i · 𝐴))) = ((exp‘(i · 𝐴)) · (exp‘(i · 𝐴))))
23	18, 18, 22	syl2anc 585	. . . . . . . . . . 11 ⊢ (𝐴 ∈ ℂ → (exp‘((i · 𝐴) + (i · 𝐴))) = ((exp‘(i · 𝐴)) · (exp‘(i · 𝐴))))
24	21, 23	eqtrd 2773	. . . . . . . . . 10 ⊢ (𝐴 ∈ ℂ → (exp‘(i · (2 · 𝐴))) = ((exp‘(i · 𝐴)) · (exp‘(i · 𝐴))))
25	24	adantr 482	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (exp‘(i · (2 · 𝐴))) = ((exp‘(i · 𝐴)) · (exp‘(i · 𝐴))))
26		sinval 16065	. . . . . . . . . . . . . . 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 2794	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) / (2 · i)) = 0)
29		efcl 16026	. . . . . . . . . . . . . . . . . 18 ⊢ ((i · 𝐴) ∈ ℂ → (exp‘(i · 𝐴)) ∈ ℂ)
30	18, 29	syl 17	. . . . . . . . . . . . . . . . 17 ⊢ (𝐴 ∈ ℂ → (exp‘(i · 𝐴)) ∈ ℂ)
31		negicn 11461	. . . . . . . . . . . . . . . . . . . 20 ⊢ -i ∈ ℂ
32	31	a1i 11	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝐴 ∈ ℂ → -i ∈ ℂ)
33	32, 11	mulcld 11234	. . . . . . . . . . . . . . . . . 18 ⊢ (𝐴 ∈ ℂ → (-i · 𝐴) ∈ ℂ)
34		efcl 16026	. . . . . . . . . . . . . . . . . 18 ⊢ ((-i · 𝐴) ∈ ℂ → (exp‘(-i · 𝐴)) ∈ ℂ)
35	33, 34	syl 17	. . . . . . . . . . . . . . . . 17 ⊢ (𝐴 ∈ ℂ → (exp‘(-i · 𝐴)) ∈ ℂ)
36	30, 35	subcld 11571	. . . . . . . . . . . . . . . 16 ⊢ (𝐴 ∈ ℂ → ((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) ∈ ℂ)
37		2mulicn 12435	. . . . . . . . . . . . . . . . 17 ⊢ (2 · i) ∈ ℂ
38	37	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ (𝐴 ∈ ℂ → (2 · i) ∈ ℂ)
39		2muline0 12436	. . . . . . . . . . . . . . . . 17 ⊢ (2 · i) ≠ 0
40	39	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ (𝐴 ∈ ℂ → (2 · i) ≠ 0)
41	36, 38, 40	diveq0ad 12000	. . . . . . . . . . . . . . 15 ⊢ (𝐴 ∈ ℂ → ((((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) / (2 · i)) = 0 ↔ ((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) = 0))
42	41	adantr 482	. . . . . . . . . . . . . 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 11581	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∈ ℂ → (((exp‘(i · 𝐴)) − (exp‘(-i · 𝐴))) = 0 ↔ (exp‘(i · 𝐴)) = (exp‘(-i · 𝐴))))
45	44	adantr 482	. . . . . . . . . . . . 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 7425	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → ((exp‘(i · 𝐴)) · (exp‘(i · 𝐴))) = ((exp‘(i · 𝐴)) · (exp‘(-i · 𝐴))))
48		efadd 16037	. . . . . . . . . . . . 13 ⊢ (((i · 𝐴) ∈ ℂ ∧ (-i · 𝐴) ∈ ℂ) → (exp‘((i · 𝐴) + (-i · 𝐴))) = ((exp‘(i · 𝐴)) · (exp‘(-i · 𝐴))))
49	18, 33, 48	syl2anc 585	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ ℂ → (exp‘((i · 𝐴) + (-i · 𝐴))) = ((exp‘(i · 𝐴)) · (exp‘(-i · 𝐴))))
50	49	adantr 482	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (exp‘((i · 𝐴) + (-i · 𝐴))) = ((exp‘(i · 𝐴)) · (exp‘(-i · 𝐴))))
51	47, 50	eqtr4d 2776	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → ((exp‘(i · 𝐴)) · (exp‘(i · 𝐴))) = (exp‘((i · 𝐴) + (-i · 𝐴))))
52	16, 32, 11	adddird 11239	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∈ ℂ → ((i + -i) · 𝐴) = ((i · 𝐴) + (-i · 𝐴)))
53	15	negidi 11529	. . . . . . . . . . . . . . 15 ⊢ (i + -i) = 0
54	53	oveq1i 7419	. . . . . . . . . . . . . 14 ⊢ ((i + -i) · 𝐴) = (0 · 𝐴)
55	52, 54	eqtr3di 2788	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ ℂ → ((i · 𝐴) + (-i · 𝐴)) = (0 · 𝐴))
56	11	mul02d 11412	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ ℂ → (0 · 𝐴) = 0)
57	55, 56	eqtrd 2773	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ ℂ → ((i · 𝐴) + (-i · 𝐴)) = 0)
58	57	fveq2d 6896	. . . . . . . . . . 11 ⊢ (𝐴 ∈ ℂ → (exp‘((i · 𝐴) + (-i · 𝐴))) = (exp‘0))
59	58	adantr 482	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (exp‘((i · 𝐴) + (-i · 𝐴))) = (exp‘0))
60		ef0 16034	. . . . . . . . . . 11 ⊢ (exp‘0) = 1
61	60	a1i 11	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (exp‘0) = 1)
62	51, 59, 61	3eqtrd 2777	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → ((exp‘(i · 𝐴)) · (exp‘(i · 𝐴))) = 1)
63	25, 62	eqtrd 2773	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (exp‘(i · (2 · 𝐴))) = 1)
64	63	fveq2d 6896	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (abs‘(exp‘(i · (2 · 𝐴)))) = (abs‘1))
65		abs1 15244	. . . . . . 7 ⊢ (abs‘1) = 1
66	64, 65	eqtrdi 2789	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (abs‘(exp‘(i · (2 · 𝐴)))) = 1)
67		absefib 16141	. . . . . . . 8 ⊢ ((2 · 𝐴) ∈ ℂ → ((2 · 𝐴) ∈ ℝ ↔ (abs‘(exp‘(i · (2 · 𝐴)))) = 1))
68	67	biimparc 481	. . . . . . 7 ⊢ (((abs‘(exp‘(i · (2 · 𝐴)))) = 1 ∧ (2 · 𝐴) ∈ ℂ) → (2 · 𝐴) ∈ ℝ)
69	68	ancoms 460	. . . . . 6 ⊢ (((2 · 𝐴) ∈ ℂ ∧ (abs‘(exp‘(i · (2 · 𝐴)))) = 1) → (2 · 𝐴) ∈ ℝ)
70	14, 66, 69	syl2an2r 684	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (2 · 𝐴) ∈ ℝ)
71		mulre 15068	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 2 ∈ ℝ ∧ 2 ≠ 0) → (𝐴 ∈ ℝ ↔ (2 · 𝐴) ∈ ℝ))
72	71	4animp1 43258	. . . . . 6 ⊢ ((((𝐴 ∈ ℂ ∧ 2 ∈ ℝ) ∧ 2 ≠ 0) ∧ (2 · 𝐴) ∈ ℝ) → 𝐴 ∈ ℝ)
73	72	4an31 43259	. . . . 5 ⊢ ((((2 ≠ 0 ∧ 2 ∈ ℝ) ∧ 𝐴 ∈ ℂ) ∧ (2 · 𝐴) ∈ ℝ) → 𝐴 ∈ ℝ)
74	5, 10, 12, 70, 73	syl1111anc 839	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → 𝐴 ∈ ℝ)
75	3	a1i 11	. . . . . . . . . . . . . . 15 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → π ∈ ℝ⁺)
76	74, 75	modcld 13840	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 mod π) ∈ ℝ)
77	76	recnd 11242	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 mod π) ∈ ℂ)
78	77	sincld 16073	. . . . . . . . . . . 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 11216	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ 0 ∈ ℝ
81	80, 1, 2	ltleii 11337	. . . . . . . . . . . . . . . . . . . . 21 ⊢ 0 ≤ π
82		gt0ne0 11679	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((π ∈ ℝ ∧ 0 < π) → π ≠ 0)
83	82	3adant3 1133	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((π ∈ ℝ ∧ 0 < π ∧ 0 ≤ π) → π ≠ 0)
84	83	3com23 1127	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((π ∈ ℝ ∧ 0 ≤ π ∧ 0 < π) → π ≠ 0)
85	1, 81, 2, 84	mp3an 1462	. . . . . . . . . . . . . . . . . . . 20 ⊢ π ≠ 0
86	85	a1i 11	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → π ≠ 0)
87	74, 79, 86	redivcld 12042	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 / π) ∈ ℝ)
88	87	flcld 13763	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (⌊‘(𝐴 / π)) ∈ ℤ)
89	88	znegcld 12668	. . . . . . . . . . . . . . . 16 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → -(⌊‘(𝐴 / π)) ∈ ℤ)
90		abssinper 26030	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐴 ∈ ℂ ∧ -(⌊‘(𝐴 / π)) ∈ ℤ) → (abs‘(sin‘(𝐴 + (-(⌊‘(𝐴 / π)) · π)))) = (abs‘(sin‘𝐴)))
91	90	eqcomd 2739	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐴 ∈ ℂ ∧ -(⌊‘(𝐴 / π)) ∈ ℤ) → (abs‘(sin‘𝐴)) = (abs‘(sin‘(𝐴 + (-(⌊‘(𝐴 / π)) · π)))))
92	91	ex 414	. . . . . . . . . . . . . . . . 17 ⊢ (𝐴 ∈ ℂ → (-(⌊‘(𝐴 / π)) ∈ ℤ → (abs‘(sin‘𝐴)) = (abs‘(sin‘(𝐴 + (-(⌊‘(𝐴 / π)) · π))))))
93	92	adantr 482	. . . . . . . . . . . . . . . 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 12667	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (⌊‘(𝐴 / π)) ∈ ℂ)
96	95	negcld 11558	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → -(⌊‘(𝐴 / π)) ∈ ℂ)
97	1	recni 11228	. . . . . . . . . . . . . . . . . . . . 21 ⊢ π ∈ ℂ
98	97	a1i 11	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → π ∈ ℂ)
99	96, 98	mulcld 11234	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (-(⌊‘(𝐴 / π)) · π) ∈ ℂ)
100	98, 95	mulcld 11234	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (π · (⌊‘(𝐴 / π))) ∈ ℂ)
101	100	negcld 11558	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → -(π · (⌊‘(𝐴 / π))) ∈ ℂ)
102	95, 98	mulneg1d 11667	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (-(⌊‘(𝐴 / π)) · π) = -((⌊‘(𝐴 / π)) · π))
103	95, 98	mulcomd 11235	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → ((⌊‘(𝐴 / π)) · π) = (π · (⌊‘(𝐴 / π))))
104	103	negeqd 11454	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → -((⌊‘(𝐴 / π)) · π) = -(π · (⌊‘(𝐴 / π))))
105	102, 104	eqtrd 2773	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (-(⌊‘(𝐴 / π)) · π) = -(π · (⌊‘(𝐴 / π))))
106		oveq2 7417	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((-(⌊‘(𝐴 / π)) · π) = -(π · (⌊‘(𝐴 / π))) → (𝐴 + (-(⌊‘(𝐴 / π)) · π)) = (𝐴 + -(π · (⌊‘(𝐴 / π)))))
107	106	ad3antrrr 729	. . . . . . . . . . . . . . . . . . . 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 43260	. . . . . . . . . . . . . . . . . . 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 839	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 + (-(⌊‘(𝐴 / π)) · π)) = (𝐴 + -(π · (⌊‘(𝐴 / π)))))
110	12, 100	negsubd 11577	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 + -(π · (⌊‘(𝐴 / π)))) = (𝐴 − (π · (⌊‘(𝐴 / π)))))
111	109, 110	eqtrd 2773	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 + (-(⌊‘(𝐴 / π)) · π)) = (𝐴 − (π · (⌊‘(𝐴 / π)))))
112	111	fveq2d 6896	. . . . . . . . . . . . . . . 16 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (sin‘(𝐴 + (-(⌊‘(𝐴 / π)) · π))) = (sin‘(𝐴 − (π · (⌊‘(𝐴 / π))))))
113	112	fveq2d 6896	. . . . . . . . . . . . . . 15 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (abs‘(sin‘(𝐴 + (-(⌊‘(𝐴 / π)) · π)))) = (abs‘(sin‘(𝐴 − (π · (⌊‘(𝐴 / π)))))))
114	94, 113	eqtrd 2773	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (abs‘(sin‘𝐴)) = (abs‘(sin‘(𝐴 − (π · (⌊‘(𝐴 / π)))))))
115		modval 13836	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ⁺) → (𝐴 mod π) = (𝐴 − (π · (⌊‘(𝐴 / π)))))
116	115	fveq2d 6896	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ⁺) → (sin‘(𝐴 mod π)) = (sin‘(𝐴 − (π · (⌊‘(𝐴 / π))))))
117	116	fveq2d 6896	. . . . . . . . . . . . . . . 16 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ⁺) → (abs‘(sin‘(𝐴 mod π))) = (abs‘(sin‘(𝐴 − (π · (⌊‘(𝐴 / π)))))))
118	3, 117	mpan2 690	. . . . . . . . . . . . . . 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 2776	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (abs‘(sin‘𝐴)) = (abs‘(sin‘(𝐴 mod π))))
121	27	fveq2d 6896	. . . . . . . . . . . . . . 15 ⊢ ((sin‘𝐴) = 0 → (abs‘(sin‘𝐴)) = (abs‘0))
122		abs0 15232	. . . . . . . . . . . . . . 15 ⊢ (abs‘0) = 0
123	121, 122	eqtrdi 2789	. . . . . . . . . . . . . 14 ⊢ ((sin‘𝐴) = 0 → (abs‘(sin‘𝐴)) = 0)
124	123	adantl 483	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (abs‘(sin‘𝐴)) = 0)
125	120, 124	eqtr3d 2775	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (abs‘(sin‘(𝐴 mod π))) = 0)
126	78, 125	abs00d 15393	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (sin‘(𝐴 mod π)) = 0)
127		notnotb 315	. . . . . . . . . . . . 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 11311	. . . . . . . . . . . . . . . 16 ⊢ ((0 ∈ ℝ ∧ 0 < (sin‘(𝐴 mod π))) → (sin‘(𝐴 mod π)) ≠ 0)
130	129	neneqd 2946	. . . . . . . . . . . . . . 15 ⊢ ((0 ∈ ℝ ∧ 0 < (sin‘(𝐴 mod π))) → ¬ (sin‘(𝐴 mod π)) = 0)
131	130	expcom 415	. . . . . . . . . . . . . 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 26017	. . . . . . . . . 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 11272	. . . . . . . . . . 11 ⊢ 0 ∈ ℝ^*
139	1	rexri 11272	. . . . . . . . . . 11 ⊢ π ∈ ℝ^*
140		elioo2 13365	. . . . . . . . . . 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 691	. . . . . . . . . 10 ⊢ ((𝐴 mod π) ∈ (0(,)π) ↔ ((𝐴 mod π) ∈ ℝ ∧ 0 < (𝐴 mod π) ∧ (𝐴 mod π) < π))
142	141	notbii 320	. . . . . . . . 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 1097	. . . . . . . . 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 320	. . . . . . . 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 13845	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ⁺) → (𝐴 mod π) < π)
148	147	ancoms 460	. . . . . . . . 9 ⊢ ((π ∈ ℝ⁺ ∧ 𝐴 ∈ ℝ) → (𝐴 mod π) < π)
149	3, 74, 148	sylancr 588	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 mod π) < π)
150	76, 149	jca 513	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → ((𝐴 mod π) ∈ ℝ ∧ (𝐴 mod π) < π))
151		not12an2impnot1 43329	. . . . . . 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 585	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → ¬ 0 < (𝐴 mod π))
153		modge0 13844	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ⁺) → 0 ≤ (𝐴 mod π))
154	153	ancoms 460	. . . . . . . 8 ⊢ ((π ∈ ℝ⁺ ∧ 𝐴 ∈ ℝ) → 0 ≤ (𝐴 mod π))
155	3, 74, 154	sylancr 588	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → 0 ≤ (𝐴 mod π))
156		leloe 11300	. . . . . . . . 9 ⊢ ((0 ∈ ℝ ∧ (𝐴 mod π) ∈ ℝ) → (0 ≤ (𝐴 mod π) ↔ (0 < (𝐴 mod π) ∨ 0 = (𝐴 mod π))))
157	156	biimp3a 1470	. . . . . . . 8 ⊢ ((0 ∈ ℝ ∧ (𝐴 mod π) ∈ ℝ ∧ 0 ≤ (𝐴 mod π)) → (0 < (𝐴 mod π) ∨ 0 = (𝐴 mod π)))
158	157	idiALT 43238	. . . . . . 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 1467	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (0 < (𝐴 mod π) ∨ 0 = (𝐴 mod π)))
160		pm2.53 850	. . . . . . . 8 ⊢ ((0 < (𝐴 mod π) ∨ 0 = (𝐴 mod π)) → (¬ 0 < (𝐴 mod π) → 0 = (𝐴 mod π)))
161	160	imp 408	. . . . . . 7 ⊢ (((0 < (𝐴 mod π) ∨ 0 = (𝐴 mod π)) ∧ ¬ 0 < (𝐴 mod π)) → 0 = (𝐴 mod π))
162	161	ancoms 460	. . . . . 6 ⊢ ((¬ 0 < (𝐴 mod π) ∧ (0 < (𝐴 mod π) ∨ 0 = (𝐴 mod π))) → 0 = (𝐴 mod π))
163	152, 159, 162	syl2anc 585	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → 0 = (𝐴 mod π))
164	163	eqcomd 2739	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 mod π) = 0)
165		mod0 13841	. . . . . 6 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ⁺) → ((𝐴 mod π) = 0 ↔ (𝐴 / π) ∈ ℤ))
166	165	biimp3a 1470	. . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ⁺ ∧ (𝐴 mod π) = 0) → (𝐴 / π) ∈ ℤ)
167	166	3com12 1124	. . . 4 ⊢ ((π ∈ ℝ⁺ ∧ 𝐴 ∈ ℝ ∧ (𝐴 mod π) = 0) → (𝐴 / π) ∈ ℤ)
168	3, 74, 164, 167	mp3an2i 1467	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ (sin‘𝐴) = 0) → (𝐴 / π) ∈ ℤ)
169	168	ex 414	. 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 11991	. . . . 5 ⊢ (𝐴 ∈ ℂ → ((𝐴 / π) · π) = 𝐴)
173	172	fveq2d 6896	. . . 4 ⊢ (𝐴 ∈ ℂ → (sin‘((𝐴 / π) · π)) = (sin‘𝐴))
174		id 22	. . . . 5 ⊢ ((𝐴 / π) ∈ ℤ → (𝐴 / π) ∈ ℤ)
175		sinkpi 26031	. . . . 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 2794	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ (𝐴 / π) ∈ ℤ) → (sin‘𝐴) = 0)
178	177	ex 414	. 2 ⊢ (𝐴 ∈ ℂ → ((𝐴 / π) ∈ ℤ → (sin‘𝐴) = 0))
179	169, 178	impbid 211	1 ⊢ (𝐴 ∈ ℂ → ((sin‘𝐴) = 0 ↔ (𝐴 / π) ∈ ℤ))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 397 ∨ wo 846 ∧ w3a 1088 = wceq 1542 ∈ wcel 2107 ≠ wne 2941 class class class wbr 5149 ‘cfv 6544 (class class class)co 7409 ℂcc 11108 ℝcr 11109 0cc0 11110 1c1 11111 ici 11112 + caddc 11113 · cmul 11115 ℝ^*cxr 11247 < clt 11248 ≤ cle 11249 − cmin 11444 -cneg 11445 / cdiv 11871 2c2 12267 ℤcz 12558 ℝ⁺crp 12974 (,)cioo 13324 ⌊cfl 13755 mod cmo 13834 abscabs 15181 expce 16005 sincsin 16007 πcpi 16010

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5286 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-inf2 9636 ax-cnex 11166 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187 ax-pre-sup 11188 ax-addf 11189 ax-mulf 11190

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3377 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-tp 4634 df-op 4636 df-uni 4910 df-int 4952 df-iun 5000 df-iin 5001 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-se 5633 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-isom 6553 df-riota 7365 df-ov 7412 df-oprab 7413 df-mpo 7414 df-of 7670 df-om 7856 df-1st 7975 df-2nd 7976 df-supp 8147 df-frecs 8266 df-wrecs 8297 df-recs 8371 df-rdg 8410 df-1o 8466 df-2o 8467 df-er 8703 df-map 8822 df-pm 8823 df-ixp 8892 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-fsupp 9362 df-fi 9406 df-sup 9437 df-inf 9438 df-oi 9505 df-card 9934 df-pnf 11250 df-mnf 11251 df-xr 11252 df-ltxr 11253 df-le 11254 df-sub 11446 df-neg 11447 df-div 11872 df-nn 12213 df-2 12275 df-3 12276 df-4 12277 df-5 12278 df-6 12279 df-7 12280 df-8 12281 df-9 12282 df-n0 12473 df-z 12559 df-dec 12678 df-uz 12823 df-q 12933 df-rp 12975 df-xneg 13092 df-xadd 13093 df-xmul 13094 df-ioo 13328 df-ioc 13329 df-ico 13330 df-icc 13331 df-fz 13485 df-fzo 13628 df-fl 13757 df-mod 13835 df-seq 13967 df-exp 14028 df-fac 14234 df-bc 14263 df-hash 14291 df-shft 15014 df-cj 15046 df-re 15047 df-im 15048 df-sqrt 15182 df-abs 15183 df-limsup 15415 df-clim 15432 df-rlim 15433 df-sum 15633 df-ef 16011 df-sin 16013 df-cos 16014 df-pi 16016 df-struct 17080 df-sets 17097 df-slot 17115 df-ndx 17127 df-base 17145 df-ress 17174 df-plusg 17210 df-mulr 17211 df-starv 17212 df-sca 17213 df-vsca 17214 df-ip 17215 df-tset 17216 df-ple 17217 df-ds 17219 df-unif 17220 df-hom 17221 df-cco 17222 df-rest 17368 df-topn 17369 df-0g 17387 df-gsum 17388 df-topgen 17389 df-pt 17390 df-prds 17393 df-xrs 17448 df-qtop 17453 df-imas 17454 df-xps 17456 df-mre 17530 df-mrc 17531 df-acs 17533 df-mgm 18561 df-sgrp 18610 df-mnd 18626 df-submnd 18672 df-mulg 18951 df-cntz 19181 df-cmn 19650 df-psmet 20936 df-xmet 20937 df-met 20938 df-bl 20939 df-mopn 20940 df-fbas 20941 df-fg 20942 df-cnfld 20945 df-top 22396 df-topon 22413 df-topsp 22435 df-bases 22449 df-cld 22523 df-ntr 22524 df-cls 22525 df-nei 22602 df-lp 22640 df-perf 22641 df-cn 22731 df-cnp 22732 df-haus 22819 df-tx 23066 df-hmeo 23259 df-fil 23350 df-fm 23442 df-flim 23443 df-flf 23444 df-xms 23826 df-ms 23827 df-tms 23828 df-cncf 24394 df-limc 25383 df-dv 25384

This theorem is referenced by: (None)

W3C validator