itgsincmulx - Mathbox for Glauco Siliprandi

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Theorem itgsincmulx 42279

Description: Exercise: the integral of 𝑥 ↦ sin𝑎𝑥 on an open interval. (Contributed by Glauco Siliprandi, 11-Dec-2019.)

**Hypotheses**
Ref	Expression
itgsincmulx.a	⊢ (𝜑 → 𝐴 ∈ ℂ)
itgsincmulx.an0	⊢ (𝜑 → 𝐴 ≠ 0)
itgsincmulx.b	⊢ (𝜑 → 𝐵 ∈ ℝ)
itgsincmulx.c	⊢ (𝜑 → 𝐶 ∈ ℝ)
itgsincmulx.blec	⊢ (𝜑 → 𝐵 ≤ 𝐶)

**Assertion**
Ref	Expression
itgsincmulx	⊢ (𝜑 → ∫(𝐵(,)𝐶)(sin‘(𝐴 · 𝑥)) d𝑥 = (((cos‘(𝐴 · 𝐵)) − (cos‘(𝐴 · 𝐶))) / 𝐴))

Distinct variable groups: 𝑥,𝐴 𝑥,𝐵 𝑥,𝐶 𝜑,𝑥

Proof of Theorem itgsincmulx Dummy variable 𝑦 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		eqid 2821	. . . . . . 7 ⊢ (𝑦 ∈ ℂ ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴)) = (𝑦 ∈ ℂ ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴))
2		itgsincmulx.a	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐴 ∈ ℂ)
3	2	adantr 483	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → 𝐴 ∈ ℂ)
4		simpr 487	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → 𝑦 ∈ ℂ)
5	3, 4	mulcld 10661	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → (𝐴 · 𝑦) ∈ ℂ)
6	5	coscld 15484	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → (cos‘(𝐴 · 𝑦)) ∈ ℂ)
7	6	negcld 10984	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → -(cos‘(𝐴 · 𝑦)) ∈ ℂ)
8		itgsincmulx.an0	. . . . . . . . 9 ⊢ (𝜑 → 𝐴 ≠ 0)
9	8	adantr 483	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → 𝐴 ≠ 0)
10	7, 3, 9	divcld 11416	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → (-(cos‘(𝐴 · 𝑦)) / 𝐴) ∈ ℂ)
11		cnelprrecn 10630	. . . . . . . . . 10 ⊢ ℂ ∈ {ℝ, ℂ}
12	11	a1i 11	. . . . . . . . 9 ⊢ (𝜑 → ℂ ∈ {ℝ, ℂ})
13	5	sincld 15483	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → (sin‘(𝐴 · 𝑦)) ∈ ℂ)
14	13	negcld 10984	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → -(sin‘(𝐴 · 𝑦)) ∈ ℂ)
15	3, 14	mulcld 10661	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → (𝐴 · -(sin‘(𝐴 · 𝑦))) ∈ ℂ)
16	15	negcld 10984	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → -(𝐴 · -(sin‘(𝐴 · 𝑦))) ∈ ℂ)
17		dvcosax 42231	. . . . . . . . . . 11 ⊢ (𝐴 ∈ ℂ → (ℂ D (𝑦 ∈ ℂ ↦ (cos‘(𝐴 · 𝑦)))) = (𝑦 ∈ ℂ ↦ (𝐴 · -(sin‘(𝐴 · 𝑦)))))
18	2, 17	syl 17	. . . . . . . . . 10 ⊢ (𝜑 → (ℂ D (𝑦 ∈ ℂ ↦ (cos‘(𝐴 · 𝑦)))) = (𝑦 ∈ ℂ ↦ (𝐴 · -(sin‘(𝐴 · 𝑦)))))
19	12, 6, 15, 18	dvmptneg 24563	. . . . . . . . 9 ⊢ (𝜑 → (ℂ D (𝑦 ∈ ℂ ↦ -(cos‘(𝐴 · 𝑦)))) = (𝑦 ∈ ℂ ↦ -(𝐴 · -(sin‘(𝐴 · 𝑦)))))
20	12, 7, 16, 19, 2, 8	dvmptdivc 24562	. . . . . . . 8 ⊢ (𝜑 → (ℂ D (𝑦 ∈ ℂ ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴))) = (𝑦 ∈ ℂ ↦ (-(𝐴 · -(sin‘(𝐴 · 𝑦))) / 𝐴)))
21	15, 3, 9	divnegd 11429	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → -((𝐴 · -(sin‘(𝐴 · 𝑦))) / 𝐴) = (-(𝐴 · -(sin‘(𝐴 · 𝑦))) / 𝐴))
22	21	eqcomd 2827	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → (-(𝐴 · -(sin‘(𝐴 · 𝑦))) / 𝐴) = -((𝐴 · -(sin‘(𝐴 · 𝑦))) / 𝐴))
23	14, 3, 9	divcan3d 11421	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → ((𝐴 · -(sin‘(𝐴 · 𝑦))) / 𝐴) = -(sin‘(𝐴 · 𝑦)))
24	23	negeqd 10880	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → -((𝐴 · -(sin‘(𝐴 · 𝑦))) / 𝐴) = --(sin‘(𝐴 · 𝑦)))
25	13	negnegd 10988	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → --(sin‘(𝐴 · 𝑦)) = (sin‘(𝐴 · 𝑦)))
26	22, 24, 25	3eqtrd 2860	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → (-(𝐴 · -(sin‘(𝐴 · 𝑦))) / 𝐴) = (sin‘(𝐴 · 𝑦)))
27	26	mpteq2dva 5161	. . . . . . . 8 ⊢ (𝜑 → (𝑦 ∈ ℂ ↦ (-(𝐴 · -(sin‘(𝐴 · 𝑦))) / 𝐴)) = (𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦))))
28	20, 27	eqtrd 2856	. . . . . . 7 ⊢ (𝜑 → (ℂ D (𝑦 ∈ ℂ ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴))) = (𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦))))
29		itgsincmulx.b	. . . . . . 7 ⊢ (𝜑 → 𝐵 ∈ ℝ)
30		itgsincmulx.c	. . . . . . 7 ⊢ (𝜑 → 𝐶 ∈ ℝ)
31	1, 10, 28, 13, 29, 30	dvmptresicc 42224	. . . . . 6 ⊢ (𝜑 → (ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴))) = (𝑦 ∈ (𝐵(,)𝐶) ↦ (sin‘(𝐴 · 𝑦))))
32	31	fveq1d 6672	. . . . 5 ⊢ (𝜑 → ((ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴)))‘𝑥) = ((𝑦 ∈ (𝐵(,)𝐶) ↦ (sin‘(𝐴 · 𝑦)))‘𝑥))
33	32	adantr 483	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → ((ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴)))‘𝑥) = ((𝑦 ∈ (𝐵(,)𝐶) ↦ (sin‘(𝐴 · 𝑦)))‘𝑥))
34		eqidd 2822	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → (𝑦 ∈ (𝐵(,)𝐶) ↦ (sin‘(𝐴 · 𝑦))) = (𝑦 ∈ (𝐵(,)𝐶) ↦ (sin‘(𝐴 · 𝑦))))
35		oveq2 7164	. . . . . . 7 ⊢ (𝑦 = 𝑥 → (𝐴 · 𝑦) = (𝐴 · 𝑥))
36	35	fveq2d 6674	. . . . . 6 ⊢ (𝑦 = 𝑥 → (sin‘(𝐴 · 𝑦)) = (sin‘(𝐴 · 𝑥)))
37	36	adantl 484	. . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) ∧ 𝑦 = 𝑥) → (sin‘(𝐴 · 𝑦)) = (sin‘(𝐴 · 𝑥)))
38		simpr 487	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → 𝑥 ∈ (𝐵(,)𝐶))
39	2	adantr 483	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → 𝐴 ∈ ℂ)
40		ioosscn 41789	. . . . . . . 8 ⊢ (𝐵(,)𝐶) ⊆ ℂ
41	40, 38	sseldi 3965	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → 𝑥 ∈ ℂ)
42	39, 41	mulcld 10661	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → (𝐴 · 𝑥) ∈ ℂ)
43	42	sincld 15483	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → (sin‘(𝐴 · 𝑥)) ∈ ℂ)
44	34, 37, 38, 43	fvmptd 6775	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → ((𝑦 ∈ (𝐵(,)𝐶) ↦ (sin‘(𝐴 · 𝑦)))‘𝑥) = (sin‘(𝐴 · 𝑥)))
45	33, 44	eqtr2d 2857	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → (sin‘(𝐴 · 𝑥)) = ((ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴)))‘𝑥))
46	45	itgeq2dv 24382	. 2 ⊢ (𝜑 → ∫(𝐵(,)𝐶)(sin‘(𝐴 · 𝑥)) d𝑥 = ∫(𝐵(,)𝐶)((ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴)))‘𝑥) d𝑥)
47		itgsincmulx.blec	. . 3 ⊢ (𝜑 → 𝐵 ≤ 𝐶)
48		sincn 25032	. . . . . 6 ⊢ sin ∈ (ℂ–cn→ℂ)
49	48	a1i 11	. . . . 5 ⊢ (𝜑 → sin ∈ (ℂ–cn→ℂ))
50	40	a1i 11	. . . . . . 7 ⊢ (𝜑 → (𝐵(,)𝐶) ⊆ ℂ)
51		ssid 3989	. . . . . . . 8 ⊢ ℂ ⊆ ℂ
52	51	a1i 11	. . . . . . 7 ⊢ (𝜑 → ℂ ⊆ ℂ)
53	50, 2, 52	constcncfg 42174	. . . . . 6 ⊢ (𝜑 → (𝑦 ∈ (𝐵(,)𝐶) ↦ 𝐴) ∈ ((𝐵(,)𝐶)–cn→ℂ))
54	50, 52	idcncfg 42175	. . . . . 6 ⊢ (𝜑 → (𝑦 ∈ (𝐵(,)𝐶) ↦ 𝑦) ∈ ((𝐵(,)𝐶)–cn→ℂ))
55	53, 54	mulcncf 24047	. . . . 5 ⊢ (𝜑 → (𝑦 ∈ (𝐵(,)𝐶) ↦ (𝐴 · 𝑦)) ∈ ((𝐵(,)𝐶)–cn→ℂ))
56	49, 55	cncfmpt1f 23521	. . . 4 ⊢ (𝜑 → (𝑦 ∈ (𝐵(,)𝐶) ↦ (sin‘(𝐴 · 𝑦))) ∈ ((𝐵(,)𝐶)–cn→ℂ))
57	31, 56	eqeltrd 2913	. . 3 ⊢ (𝜑 → (ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴))) ∈ ((𝐵(,)𝐶)–cn→ℂ))
58		ioossicc 12823	. . . . . 6 ⊢ (𝐵(,)𝐶) ⊆ (𝐵[,]𝐶)
59	58	a1i 11	. . . . 5 ⊢ (𝜑 → (𝐵(,)𝐶) ⊆ (𝐵[,]𝐶))
60		ioombl 24166	. . . . . 6 ⊢ (𝐵(,)𝐶) ∈ dom vol
61	60	a1i 11	. . . . 5 ⊢ (𝜑 → (𝐵(,)𝐶) ∈ dom vol)
62	2	adantr 483	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐵[,]𝐶)) → 𝐴 ∈ ℂ)
63	29, 30	iccssred 41800	. . . . . . . . 9 ⊢ (𝜑 → (𝐵[,]𝐶) ⊆ ℝ)
64		ax-resscn 10594	. . . . . . . . 9 ⊢ ℝ ⊆ ℂ
65	63, 64	sstrdi 3979	. . . . . . . 8 ⊢ (𝜑 → (𝐵[,]𝐶) ⊆ ℂ)
66	65	sselda 3967	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐵[,]𝐶)) → 𝑦 ∈ ℂ)
67	62, 66	mulcld 10661	. . . . . 6 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐵[,]𝐶)) → (𝐴 · 𝑦) ∈ ℂ)
68	67	sincld 15483	. . . . 5 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐵[,]𝐶)) → (sin‘(𝐴 · 𝑦)) ∈ ℂ)
69	65, 2, 52	constcncfg 42174	. . . . . . . 8 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ 𝐴) ∈ ((𝐵[,]𝐶)–cn→ℂ))
70	65, 52	idcncfg 42175	. . . . . . . 8 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ 𝑦) ∈ ((𝐵[,]𝐶)–cn→ℂ))
71	69, 70	mulcncf 24047	. . . . . . 7 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ (𝐴 · 𝑦)) ∈ ((𝐵[,]𝐶)–cn→ℂ))
72	49, 71	cncfmpt1f 23521	. . . . . 6 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ (sin‘(𝐴 · 𝑦))) ∈ ((𝐵[,]𝐶)–cn→ℂ))
73		cniccibl 24441	. . . . . 6 ⊢ ((𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ ∧ (𝑦 ∈ (𝐵[,]𝐶) ↦ (sin‘(𝐴 · 𝑦))) ∈ ((𝐵[,]𝐶)–cn→ℂ)) → (𝑦 ∈ (𝐵[,]𝐶) ↦ (sin‘(𝐴 · 𝑦))) ∈ 𝐿¹)
74	29, 30, 72, 73	syl3anc 1367	. . . . 5 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ (sin‘(𝐴 · 𝑦))) ∈ 𝐿¹)
75	59, 61, 68, 74	iblss 24405	. . . 4 ⊢ (𝜑 → (𝑦 ∈ (𝐵(,)𝐶) ↦ (sin‘(𝐴 · 𝑦))) ∈ 𝐿¹)
76	31, 75	eqeltrd 2913	. . 3 ⊢ (𝜑 → (ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴))) ∈ 𝐿¹)
77		coscn 25033	. . . . . . 7 ⊢ cos ∈ (ℂ–cn→ℂ)
78	77	a1i 11	. . . . . 6 ⊢ (𝜑 → cos ∈ (ℂ–cn→ℂ))
79	78, 71	cncfmpt1f 23521	. . . . 5 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ (cos‘(𝐴 · 𝑦))) ∈ ((𝐵[,]𝐶)–cn→ℂ))
80	79	negcncfg 42184	. . . 4 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ -(cos‘(𝐴 · 𝑦))) ∈ ((𝐵[,]𝐶)–cn→ℂ))
81	8	neneqd 3021	. . . . . . 7 ⊢ (𝜑 → ¬ 𝐴 = 0)
82		elsng 4581	. . . . . . . 8 ⊢ (𝐴 ∈ ℂ → (𝐴 ∈ {0} ↔ 𝐴 = 0))
83	2, 82	syl 17	. . . . . . 7 ⊢ (𝜑 → (𝐴 ∈ {0} ↔ 𝐴 = 0))
84	81, 83	mtbird 327	. . . . . 6 ⊢ (𝜑 → ¬ 𝐴 ∈ {0})
85	2, 84	eldifd 3947	. . . . 5 ⊢ (𝜑 → 𝐴 ∈ (ℂ ∖ {0}))
86		difssd 4109	. . . . 5 ⊢ (𝜑 → (ℂ ∖ {0}) ⊆ ℂ)
87	65, 85, 86	constcncfg 42174	. . . 4 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ 𝐴) ∈ ((𝐵[,]𝐶)–cn→(ℂ ∖ {0})))
88	80, 87	divcncf 24048	. . 3 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴)) ∈ ((𝐵[,]𝐶)–cn→ℂ))
89	29, 30, 47, 57, 76, 88	ftc2 24641	. 2 ⊢ (𝜑 → ∫(𝐵(,)𝐶)((ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴)))‘𝑥) d𝑥 = (((𝑦 ∈ (𝐵[,]𝐶) ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴))‘𝐶) − ((𝑦 ∈ (𝐵[,]𝐶) ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴))‘𝐵)))
90		eqidd 2822	. . . . . 6 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴)) = (𝑦 ∈ (𝐵[,]𝐶) ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴)))
91		oveq2 7164	. . . . . . . . . 10 ⊢ (𝑦 = 𝐶 → (𝐴 · 𝑦) = (𝐴 · 𝐶))
92	91	fveq2d 6674	. . . . . . . . 9 ⊢ (𝑦 = 𝐶 → (cos‘(𝐴 · 𝑦)) = (cos‘(𝐴 · 𝐶)))
93	92	negeqd 10880	. . . . . . . 8 ⊢ (𝑦 = 𝐶 → -(cos‘(𝐴 · 𝑦)) = -(cos‘(𝐴 · 𝐶)))
94	93	oveq1d 7171	. . . . . . 7 ⊢ (𝑦 = 𝐶 → (-(cos‘(𝐴 · 𝑦)) / 𝐴) = (-(cos‘(𝐴 · 𝐶)) / 𝐴))
95	94	adantl 484	. . . . . 6 ⊢ ((𝜑 ∧ 𝑦 = 𝐶) → (-(cos‘(𝐴 · 𝑦)) / 𝐴) = (-(cos‘(𝐴 · 𝐶)) / 𝐴))
96	29	rexrd 10691	. . . . . . 7 ⊢ (𝜑 → 𝐵 ∈ ℝ^*)
97	30	rexrd 10691	. . . . . . 7 ⊢ (𝜑 → 𝐶 ∈ ℝ^*)
98		ubicc2 12854	. . . . . . 7 ⊢ ((𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^* ∧ 𝐵 ≤ 𝐶) → 𝐶 ∈ (𝐵[,]𝐶))
99	96, 97, 47, 98	syl3anc 1367	. . . . . 6 ⊢ (𝜑 → 𝐶 ∈ (𝐵[,]𝐶))
100		ovexd 7191	. . . . . 6 ⊢ (𝜑 → (-(cos‘(𝐴 · 𝐶)) / 𝐴) ∈ V)
101	90, 95, 99, 100	fvmptd 6775	. . . . 5 ⊢ (𝜑 → ((𝑦 ∈ (𝐵[,]𝐶) ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴))‘𝐶) = (-(cos‘(𝐴 · 𝐶)) / 𝐴))
102		oveq2 7164	. . . . . . . . . 10 ⊢ (𝑦 = 𝐵 → (𝐴 · 𝑦) = (𝐴 · 𝐵))
103	102	fveq2d 6674	. . . . . . . . 9 ⊢ (𝑦 = 𝐵 → (cos‘(𝐴 · 𝑦)) = (cos‘(𝐴 · 𝐵)))
104	103	negeqd 10880	. . . . . . . 8 ⊢ (𝑦 = 𝐵 → -(cos‘(𝐴 · 𝑦)) = -(cos‘(𝐴 · 𝐵)))
105	104	oveq1d 7171	. . . . . . 7 ⊢ (𝑦 = 𝐵 → (-(cos‘(𝐴 · 𝑦)) / 𝐴) = (-(cos‘(𝐴 · 𝐵)) / 𝐴))
106	105	adantl 484	. . . . . 6 ⊢ ((𝜑 ∧ 𝑦 = 𝐵) → (-(cos‘(𝐴 · 𝑦)) / 𝐴) = (-(cos‘(𝐴 · 𝐵)) / 𝐴))
107		lbicc2 12853	. . . . . . 7 ⊢ ((𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^* ∧ 𝐵 ≤ 𝐶) → 𝐵 ∈ (𝐵[,]𝐶))
108	96, 97, 47, 107	syl3anc 1367	. . . . . 6 ⊢ (𝜑 → 𝐵 ∈ (𝐵[,]𝐶))
109		ovexd 7191	. . . . . 6 ⊢ (𝜑 → (-(cos‘(𝐴 · 𝐵)) / 𝐴) ∈ V)
110	90, 106, 108, 109	fvmptd 6775	. . . . 5 ⊢ (𝜑 → ((𝑦 ∈ (𝐵[,]𝐶) ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴))‘𝐵) = (-(cos‘(𝐴 · 𝐵)) / 𝐴))
111	101, 110	oveq12d 7174	. . . 4 ⊢ (𝜑 → (((𝑦 ∈ (𝐵[,]𝐶) ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴))‘𝐶) − ((𝑦 ∈ (𝐵[,]𝐶) ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴))‘𝐵)) = ((-(cos‘(𝐴 · 𝐶)) / 𝐴) − (-(cos‘(𝐴 · 𝐵)) / 𝐴)))
112	29	recnd 10669	. . . . . . . . 9 ⊢ (𝜑 → 𝐵 ∈ ℂ)
113	2, 112	mulcld 10661	. . . . . . . 8 ⊢ (𝜑 → (𝐴 · 𝐵) ∈ ℂ)
114	113	coscld 15484	. . . . . . 7 ⊢ (𝜑 → (cos‘(𝐴 · 𝐵)) ∈ ℂ)
115	114, 2, 8	divnegd 11429	. . . . . 6 ⊢ (𝜑 → -((cos‘(𝐴 · 𝐵)) / 𝐴) = (-(cos‘(𝐴 · 𝐵)) / 𝐴))
116	115	eqcomd 2827	. . . . 5 ⊢ (𝜑 → (-(cos‘(𝐴 · 𝐵)) / 𝐴) = -((cos‘(𝐴 · 𝐵)) / 𝐴))
117	116	oveq2d 7172	. . . 4 ⊢ (𝜑 → ((-(cos‘(𝐴 · 𝐶)) / 𝐴) − (-(cos‘(𝐴 · 𝐵)) / 𝐴)) = ((-(cos‘(𝐴 · 𝐶)) / 𝐴) − -((cos‘(𝐴 · 𝐵)) / 𝐴)))
118	30	recnd 10669	. . . . . . . . 9 ⊢ (𝜑 → 𝐶 ∈ ℂ)
119	2, 118	mulcld 10661	. . . . . . . 8 ⊢ (𝜑 → (𝐴 · 𝐶) ∈ ℂ)
120	119	coscld 15484	. . . . . . 7 ⊢ (𝜑 → (cos‘(𝐴 · 𝐶)) ∈ ℂ)
121	120	negcld 10984	. . . . . 6 ⊢ (𝜑 → -(cos‘(𝐴 · 𝐶)) ∈ ℂ)
122	121, 2, 8	divcld 11416	. . . . 5 ⊢ (𝜑 → (-(cos‘(𝐴 · 𝐶)) / 𝐴) ∈ ℂ)
123	114, 2, 8	divcld 11416	. . . . 5 ⊢ (𝜑 → ((cos‘(𝐴 · 𝐵)) / 𝐴) ∈ ℂ)
124	122, 123	subnegd 11004	. . . 4 ⊢ (𝜑 → ((-(cos‘(𝐴 · 𝐶)) / 𝐴) − -((cos‘(𝐴 · 𝐵)) / 𝐴)) = ((-(cos‘(𝐴 · 𝐶)) / 𝐴) + ((cos‘(𝐴 · 𝐵)) / 𝐴)))
125	111, 117, 124	3eqtrd 2860	. . 3 ⊢ (𝜑 → (((𝑦 ∈ (𝐵[,]𝐶) ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴))‘𝐶) − ((𝑦 ∈ (𝐵[,]𝐶) ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴))‘𝐵)) = ((-(cos‘(𝐴 · 𝐶)) / 𝐴) + ((cos‘(𝐴 · 𝐵)) / 𝐴)))
126	122, 123	addcomd 10842	. . 3 ⊢ (𝜑 → ((-(cos‘(𝐴 · 𝐶)) / 𝐴) + ((cos‘(𝐴 · 𝐵)) / 𝐴)) = (((cos‘(𝐴 · 𝐵)) / 𝐴) + (-(cos‘(𝐴 · 𝐶)) / 𝐴)))
127	120, 2, 8	divnegd 11429	. . . . . 6 ⊢ (𝜑 → -((cos‘(𝐴 · 𝐶)) / 𝐴) = (-(cos‘(𝐴 · 𝐶)) / 𝐴))
128	127	eqcomd 2827	. . . . 5 ⊢ (𝜑 → (-(cos‘(𝐴 · 𝐶)) / 𝐴) = -((cos‘(𝐴 · 𝐶)) / 𝐴))
129	128	oveq2d 7172	. . . 4 ⊢ (𝜑 → (((cos‘(𝐴 · 𝐵)) / 𝐴) + (-(cos‘(𝐴 · 𝐶)) / 𝐴)) = (((cos‘(𝐴 · 𝐵)) / 𝐴) + -((cos‘(𝐴 · 𝐶)) / 𝐴)))
130	120, 2, 8	divcld 11416	. . . . 5 ⊢ (𝜑 → ((cos‘(𝐴 · 𝐶)) / 𝐴) ∈ ℂ)
131	123, 130	negsubd 11003	. . . 4 ⊢ (𝜑 → (((cos‘(𝐴 · 𝐵)) / 𝐴) + -((cos‘(𝐴 · 𝐶)) / 𝐴)) = (((cos‘(𝐴 · 𝐵)) / 𝐴) − ((cos‘(𝐴 · 𝐶)) / 𝐴)))
132	114, 120, 2, 8	divsubdird 11455	. . . . 5 ⊢ (𝜑 → (((cos‘(𝐴 · 𝐵)) − (cos‘(𝐴 · 𝐶))) / 𝐴) = (((cos‘(𝐴 · 𝐵)) / 𝐴) − ((cos‘(𝐴 · 𝐶)) / 𝐴)))
133	132	eqcomd 2827	. . . 4 ⊢ (𝜑 → (((cos‘(𝐴 · 𝐵)) / 𝐴) − ((cos‘(𝐴 · 𝐶)) / 𝐴)) = (((cos‘(𝐴 · 𝐵)) − (cos‘(𝐴 · 𝐶))) / 𝐴))
134	129, 131, 133	3eqtrd 2860	. . 3 ⊢ (𝜑 → (((cos‘(𝐴 · 𝐵)) / 𝐴) + (-(cos‘(𝐴 · 𝐶)) / 𝐴)) = (((cos‘(𝐴 · 𝐵)) − (cos‘(𝐴 · 𝐶))) / 𝐴))
135	125, 126, 134	3eqtrd 2860	. 2 ⊢ (𝜑 → (((𝑦 ∈ (𝐵[,]𝐶) ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴))‘𝐶) − ((𝑦 ∈ (𝐵[,]𝐶) ↦ (-(cos‘(𝐴 · 𝑦)) / 𝐴))‘𝐵)) = (((cos‘(𝐴 · 𝐵)) − (cos‘(𝐴 · 𝐶))) / 𝐴))
136	46, 89, 135	3eqtrd 2860	1 ⊢ (𝜑 → ∫(𝐵(,)𝐶)(sin‘(𝐴 · 𝑥)) d𝑥 = (((cos‘(𝐴 · 𝐵)) − (cos‘(𝐴 · 𝐶))) / 𝐴))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 = wceq 1537 ∈ wcel 2114 ≠ wne 3016 Vcvv 3494 ∖ cdif 3933 ⊆ wss 3936 {csn 4567 {cpr 4569 class class class wbr 5066 ↦ cmpt 5146 dom cdm 5555 ‘cfv 6355 (class class class)co 7156 ℂcc 10535 ℝcr 10536 0cc0 10537 + caddc 10540 · cmul 10542 ℝ^*cxr 10674 ≤ cle 10676 − cmin 10870 -cneg 10871 / cdiv 11297 (,)cioo 12739 [,]cicc 12742 sincsin 15417 cosccos 15418 –cn→ccncf 23484 volcvol 24064 𝐿¹cibl 24218 ∫citg 24219 D cdv 24461

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-rep 5190 ax-sep 5203 ax-nul 5210 ax-pow 5266 ax-pr 5330 ax-un 7461 ax-inf2 9104 ax-cc 9857 ax-cnex 10593 ax-resscn 10594 ax-1cn 10595 ax-icn 10596 ax-addcl 10597 ax-addrcl 10598 ax-mulcl 10599 ax-mulrcl 10600 ax-mulcom 10601 ax-addass 10602 ax-mulass 10603 ax-distr 10604 ax-i2m1 10605 ax-1ne0 10606 ax-1rid 10607 ax-rnegex 10608 ax-rrecex 10609 ax-cnre 10610 ax-pre-lttri 10611 ax-pre-lttrn 10612 ax-pre-ltadd 10613 ax-pre-mulgt0 10614 ax-pre-sup 10615 ax-addf 10616 ax-mulf 10617

This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-fal 1550 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-reu 3145 df-rmo 3146 df-rab 3147 df-v 3496 df-sbc 3773 df-csb 3884 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-pss 3954 df-symdif 4219 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4568 df-pr 4570 df-tp 4572 df-op 4574 df-uni 4839 df-int 4877 df-iun 4921 df-iin 4922 df-disj 5032 df-br 5067 df-opab 5129 df-mpt 5147 df-tr 5173 df-id 5460 df-eprel 5465 df-po 5474 df-so 5475 df-fr 5514 df-se 5515 df-we 5516 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-rn 5566 df-res 5567 df-ima 5568 df-pred 6148 df-ord 6194 df-on 6195 df-lim 6196 df-suc 6197 df-iota 6314 df-fun 6357 df-fn 6358 df-f 6359 df-f1 6360 df-fo 6361 df-f1o 6362 df-fv 6363 df-isom 6364 df-riota 7114 df-ov 7159 df-oprab 7160 df-mpo 7161 df-of 7409 df-ofr 7410 df-om 7581 df-1st 7689 df-2nd 7690 df-supp 7831 df-wrecs 7947 df-recs 8008 df-rdg 8046 df-1o 8102 df-2o 8103 df-oadd 8106 df-omul 8107 df-er 8289 df-map 8408 df-pm 8409 df-ixp 8462 df-en 8510 df-dom 8511 df-sdom 8512 df-fin 8513 df-fsupp 8834 df-fi 8875 df-sup 8906 df-inf 8907 df-oi 8974 df-dju 9330 df-card 9368 df-acn 9371 df-pnf 10677 df-mnf 10678 df-xr 10679 df-ltxr 10680 df-le 10681 df-sub 10872 df-neg 10873 df-div 11298 df-nn 11639 df-2 11701 df-3 11702 df-4 11703 df-5 11704 df-6 11705 df-7 11706 df-8 11707 df-9 11708 df-n0 11899 df-z 11983 df-dec 12100 df-uz 12245 df-q 12350 df-rp 12391 df-xneg 12508 df-xadd 12509 df-xmul 12510 df-ioo 12743 df-ioc 12744 df-ico 12745 df-icc 12746 df-fz 12894 df-fzo 13035 df-fl 13163 df-mod 13239 df-seq 13371 df-exp 13431 df-fac 13635 df-bc 13664 df-hash 13692 df-shft 14426 df-cj 14458 df-re 14459 df-im 14460 df-sqrt 14594 df-abs 14595 df-limsup 14828 df-clim 14845 df-rlim 14846 df-sum 15043 df-ef 15421 df-sin 15423 df-cos 15424 df-struct 16485 df-ndx 16486 df-slot 16487 df-base 16489 df-sets 16490 df-ress 16491 df-plusg 16578 df-mulr 16579 df-starv 16580 df-sca 16581 df-vsca 16582 df-ip 16583 df-tset 16584 df-ple 16585 df-ds 16587 df-unif 16588 df-hom 16589 df-cco 16590 df-rest 16696 df-topn 16697 df-0g 16715 df-gsum 16716 df-topgen 16717 df-pt 16718 df-prds 16721 df-xrs 16775 df-qtop 16780 df-imas 16781 df-xps 16783 df-mre 16857 df-mrc 16858 df-acs 16860 df-mgm 17852 df-sgrp 17901 df-mnd 17912 df-submnd 17957 df-mulg 18225 df-cntz 18447 df-cmn 18908 df-psmet 20537 df-xmet 20538 df-met 20539 df-bl 20540 df-mopn 20541 df-fbas 20542 df-fg 20543 df-cnfld 20546 df-top 21502 df-topon 21519 df-topsp 21541 df-bases 21554 df-cld 21627 df-ntr 21628 df-cls 21629 df-nei 21706 df-lp 21744 df-perf 21745 df-cn 21835 df-cnp 21836 df-haus 21923 df-cmp 21995 df-tx 22170 df-hmeo 22363 df-fil 22454 df-fm 22546 df-flim 22547 df-flf 22548 df-xms 22930 df-ms 22931 df-tms 22932 df-cncf 23486 df-ovol 24065 df-vol 24066 df-mbf 24220 df-itg1 24221 df-itg2 24222 df-ibl 24223 df-itg 24224 df-0p 24271 df-limc 24464 df-dv 24465

This theorem is referenced by: sqwvfourb 42534

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