itgcoscmulx - Mathbox for Glauco Siliprandi

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Theorem itgcoscmulx 46503

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

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

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

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

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

Step	Hyp	Ref	Expression
1		itgcoscmulx.b	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐵 ∈ ℝ)
2		itgcoscmulx.c	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐶 ∈ ℝ)
3	1, 2	iccssred 13431	. . . . . . . . . 10 ⊢ (𝜑 → (𝐵[,]𝐶) ⊆ ℝ)
4	3	resmptd 6024	. . . . . . . . 9 ⊢ (𝜑 → ((𝑦 ∈ ℝ ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)) ↾ (𝐵[,]𝐶)) = (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)))
5	4	eqcomd 2767	. . . . . . . 8 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)) = ((𝑦 ∈ ℝ ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)) ↾ (𝐵[,]𝐶)))
6	5	oveq2d 7406	. . . . . . 7 ⊢ (𝜑 → (ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))) = (ℝ D ((𝑦 ∈ ℝ ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)) ↾ (𝐵[,]𝐶))))
7		ax-resscn 11123	. . . . . . . . 9 ⊢ ℝ ⊆ ℂ
8	7	a1i 11	. . . . . . . 8 ⊢ (𝜑 → ℝ ⊆ ℂ)
9	8	sselda 3934	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ) → 𝑦 ∈ ℂ)
10		itgcoscmulx.a	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝐴 ∈ ℂ)
11	10	adantr 484	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → 𝐴 ∈ ℂ)
12		simpr 488	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → 𝑦 ∈ ℂ)
13	11, 12	mulcld 11195	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → (𝐴 · 𝑦) ∈ ℂ)
14	13	sincld 16152	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → (sin‘(𝐴 · 𝑦)) ∈ ℂ)
15		itgcoscmulx.an0	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐴 ≠ 0)
16	15	adantr 484	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → 𝐴 ≠ 0)
17	14, 11, 16	divcld 11960	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → ((sin‘(𝐴 · 𝑦)) / 𝐴) ∈ ℂ)
18	9, 17	syldan 600	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ) → ((sin‘(𝐴 · 𝑦)) / 𝐴) ∈ ℂ)
19	18	fmpttd 7090	. . . . . . . 8 ⊢ (𝜑 → (𝑦 ∈ ℝ ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)):ℝ⟶ℂ)
20		ssidd 3957	. . . . . . . 8 ⊢ (𝜑 → ℝ ⊆ ℝ)
21		eqid 2761	. . . . . . . . 9 ⊢ (TopOpen‘ℂ_fld) = (TopOpen‘ℂ_fld)
22		tgioo4 24852	. . . . . . . . 9 ⊢ (topGen‘ran (,)) = ((TopOpen‘ℂ_fld) ↾_t ℝ)
23	21, 22	dvres 25960	. . . . . . . 8 ⊢ (((ℝ ⊆ ℂ ∧ (𝑦 ∈ ℝ ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)):ℝ⟶ℂ) ∧ (ℝ ⊆ ℝ ∧ (𝐵[,]𝐶) ⊆ ℝ)) → (ℝ D ((𝑦 ∈ ℝ ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)) ↾ (𝐵[,]𝐶))) = ((ℝ D (𝑦 ∈ ℝ ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))) ↾ ((int‘(topGen‘ran (,)))‘(𝐵[,]𝐶))))
24	8, 19, 20, 3, 23	syl22anc 849	. . . . . . 7 ⊢ (𝜑 → (ℝ D ((𝑦 ∈ ℝ ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)) ↾ (𝐵[,]𝐶))) = ((ℝ D (𝑦 ∈ ℝ ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))) ↾ ((int‘(topGen‘ran (,)))‘(𝐵[,]𝐶))))
25		reelprrecn 11158	. . . . . . . . . . 11 ⊢ ℝ ∈ {ℝ, ℂ}
26	25	a1i 11	. . . . . . . . . 10 ⊢ (𝜑 → ℝ ∈ {ℝ, ℂ})
27	9, 14	syldan 600	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ) → (sin‘(𝐴 · 𝑦)) ∈ ℂ)
28	10	adantr 484	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ) → 𝐴 ∈ ℂ)
29	28, 9	mulcld 11195	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ) → (𝐴 · 𝑦) ∈ ℂ)
30	29	coscld 16153	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ) → (cos‘(𝐴 · 𝑦)) ∈ ℂ)
31	28, 30	mulcld 11195	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ) → (𝐴 · (cos‘(𝐴 · 𝑦))) ∈ ℂ)
32	8	resmptd 6024	. . . . . . . . . . . . 13 ⊢ (𝜑 → ((𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦))) ↾ ℝ) = (𝑦 ∈ ℝ ↦ (sin‘(𝐴 · 𝑦))))
33	32	eqcomd 2767	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝑦 ∈ ℝ ↦ (sin‘(𝐴 · 𝑦))) = ((𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦))) ↾ ℝ))
34	33	oveq2d 7406	. . . . . . . . . . 11 ⊢ (𝜑 → (ℝ D (𝑦 ∈ ℝ ↦ (sin‘(𝐴 · 𝑦)))) = (ℝ D ((𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦))) ↾ ℝ)))
35	14	fmpttd 7090	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦))):ℂ⟶ℂ)
36		ssidd 3957	. . . . . . . . . . . . 13 ⊢ (𝜑 → ℂ ⊆ ℂ)
37		dvsinax 46447	. . . . . . . . . . . . . . . . 17 ⊢ (𝐴 ∈ ℂ → (ℂ D (𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦)))) = (𝑦 ∈ ℂ ↦ (𝐴 · (cos‘(𝐴 · 𝑦)))))
38	10, 37	syl 17	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → (ℂ D (𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦)))) = (𝑦 ∈ ℂ ↦ (𝐴 · (cos‘(𝐴 · 𝑦)))))
39	38	dmeqd 5877	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → dom (ℂ D (𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦)))) = dom (𝑦 ∈ ℂ ↦ (𝐴 · (cos‘(𝐴 · 𝑦)))))
40	13	coscld 16153	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → (cos‘(𝐴 · 𝑦)) ∈ ℂ)
41	11, 40	mulcld 11195	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → (𝐴 · (cos‘(𝐴 · 𝑦))) ∈ ℂ)
42	41	ralrimiva 3153	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → ∀𝑦 ∈ ℂ (𝐴 · (cos‘(𝐴 · 𝑦))) ∈ ℂ)
43		dmmptg 6223	. . . . . . . . . . . . . . . 16 ⊢ (∀𝑦 ∈ ℂ (𝐴 · (cos‘(𝐴 · 𝑦))) ∈ ℂ → dom (𝑦 ∈ ℂ ↦ (𝐴 · (cos‘(𝐴 · 𝑦)))) = ℂ)
44	42, 43	syl 17	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → dom (𝑦 ∈ ℂ ↦ (𝐴 · (cos‘(𝐴 · 𝑦)))) = ℂ)
45	39, 44	eqtr2d 2797	. . . . . . . . . . . . . 14 ⊢ (𝜑 → ℂ = dom (ℂ D (𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦)))))
46	7, 45	sseqtrid 3976	. . . . . . . . . . . . 13 ⊢ (𝜑 → ℝ ⊆ dom (ℂ D (𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦)))))
47		dvres3 25962	. . . . . . . . . . . . 13 ⊢ (((ℝ ∈ {ℝ, ℂ} ∧ (𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦))):ℂ⟶ℂ) ∧ (ℂ ⊆ ℂ ∧ ℝ ⊆ dom (ℂ D (𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦)))))) → (ℝ D ((𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦))) ↾ ℝ)) = ((ℂ D (𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦)))) ↾ ℝ))
48	26, 35, 36, 46, 47	syl22anc 849	. . . . . . . . . . . 12 ⊢ (𝜑 → (ℝ D ((𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦))) ↾ ℝ)) = ((ℂ D (𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦)))) ↾ ℝ))
49	38	reseq1d 5960	. . . . . . . . . . . 12 ⊢ (𝜑 → ((ℂ D (𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦)))) ↾ ℝ) = ((𝑦 ∈ ℂ ↦ (𝐴 · (cos‘(𝐴 · 𝑦)))) ↾ ℝ))
50	8	resmptd 6024	. . . . . . . . . . . 12 ⊢ (𝜑 → ((𝑦 ∈ ℂ ↦ (𝐴 · (cos‘(𝐴 · 𝑦)))) ↾ ℝ) = (𝑦 ∈ ℝ ↦ (𝐴 · (cos‘(𝐴 · 𝑦)))))
51	48, 49, 50	3eqtrd 2800	. . . . . . . . . . 11 ⊢ (𝜑 → (ℝ D ((𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦))) ↾ ℝ)) = (𝑦 ∈ ℝ ↦ (𝐴 · (cos‘(𝐴 · 𝑦)))))
52	34, 51	eqtrd 2796	. . . . . . . . . 10 ⊢ (𝜑 → (ℝ D (𝑦 ∈ ℝ ↦ (sin‘(𝐴 · 𝑦)))) = (𝑦 ∈ ℝ ↦ (𝐴 · (cos‘(𝐴 · 𝑦)))))
53	26, 27, 31, 52, 10, 15	dvmptdivc 26014	. . . . . . . . 9 ⊢ (𝜑 → (ℝ D (𝑦 ∈ ℝ ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))) = (𝑦 ∈ ℝ ↦ ((𝐴 · (cos‘(𝐴 · 𝑦))) / 𝐴)))
54		iccntr 24869	. . . . . . . . . 10 ⊢ ((𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → ((int‘(topGen‘ran (,)))‘(𝐵[,]𝐶)) = (𝐵(,)𝐶))
55	1, 2, 54	syl2anc 593	. . . . . . . . 9 ⊢ (𝜑 → ((int‘(topGen‘ran (,)))‘(𝐵[,]𝐶)) = (𝐵(,)𝐶))
56	53, 55	reseq12d 5962	. . . . . . . 8 ⊢ (𝜑 → ((ℝ D (𝑦 ∈ ℝ ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))) ↾ ((int‘(topGen‘ran (,)))‘(𝐵[,]𝐶))) = ((𝑦 ∈ ℝ ↦ ((𝐴 · (cos‘(𝐴 · 𝑦))) / 𝐴)) ↾ (𝐵(,)𝐶)))
57		ioossre 13404	. . . . . . . . 9 ⊢ (𝐵(,)𝐶) ⊆ ℝ
58		resmpt 6021	. . . . . . . . 9 ⊢ ((𝐵(,)𝐶) ⊆ ℝ → ((𝑦 ∈ ℝ ↦ ((𝐴 · (cos‘(𝐴 · 𝑦))) / 𝐴)) ↾ (𝐵(,)𝐶)) = (𝑦 ∈ (𝐵(,)𝐶) ↦ ((𝐴 · (cos‘(𝐴 · 𝑦))) / 𝐴)))
59	57, 58	mp1i 13	. . . . . . . 8 ⊢ (𝜑 → ((𝑦 ∈ ℝ ↦ ((𝐴 · (cos‘(𝐴 · 𝑦))) / 𝐴)) ↾ (𝐵(,)𝐶)) = (𝑦 ∈ (𝐵(,)𝐶) ↦ ((𝐴 · (cos‘(𝐴 · 𝑦))) / 𝐴)))
60		elioore 13372	. . . . . . . . . . . 12 ⊢ (𝑦 ∈ (𝐵(,)𝐶) → 𝑦 ∈ ℝ)
61	60	recnd 11203	. . . . . . . . . . 11 ⊢ (𝑦 ∈ (𝐵(,)𝐶) → 𝑦 ∈ ℂ)
62	61, 40	sylan2 602	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐵(,)𝐶)) → (cos‘(𝐴 · 𝑦)) ∈ ℂ)
63	10	adantr 484	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐵(,)𝐶)) → 𝐴 ∈ ℂ)
64	15	adantr 484	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐵(,)𝐶)) → 𝐴 ≠ 0)
65	62, 63, 64	divcan3d 11965	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐵(,)𝐶)) → ((𝐴 · (cos‘(𝐴 · 𝑦))) / 𝐴) = (cos‘(𝐴 · 𝑦)))
66	65	mpteq2dva 5190	. . . . . . . 8 ⊢ (𝜑 → (𝑦 ∈ (𝐵(,)𝐶) ↦ ((𝐴 · (cos‘(𝐴 · 𝑦))) / 𝐴)) = (𝑦 ∈ (𝐵(,)𝐶) ↦ (cos‘(𝐴 · 𝑦))))
67	56, 59, 66	3eqtrd 2800	. . . . . . 7 ⊢ (𝜑 → ((ℝ D (𝑦 ∈ ℝ ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))) ↾ ((int‘(topGen‘ran (,)))‘(𝐵[,]𝐶))) = (𝑦 ∈ (𝐵(,)𝐶) ↦ (cos‘(𝐴 · 𝑦))))
68	6, 24, 67	3eqtrd 2800	. . . . . 6 ⊢ (𝜑 → (ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))) = (𝑦 ∈ (𝐵(,)𝐶) ↦ (cos‘(𝐴 · 𝑦))))
69	68	adantr 484	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → (ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))) = (𝑦 ∈ (𝐵(,)𝐶) ↦ (cos‘(𝐴 · 𝑦))))
70		oveq2 7398	. . . . . . 7 ⊢ (𝑦 = 𝑥 → (𝐴 · 𝑦) = (𝐴 · 𝑥))
71	70	fveq2d 6865	. . . . . 6 ⊢ (𝑦 = 𝑥 → (cos‘(𝐴 · 𝑦)) = (cos‘(𝐴 · 𝑥)))
72	71	adantl 485	. . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) ∧ 𝑦 = 𝑥) → (cos‘(𝐴 · 𝑦)) = (cos‘(𝐴 · 𝑥)))
73		simpr 488	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → 𝑥 ∈ (𝐵(,)𝐶))
74	10	adantr 484	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → 𝐴 ∈ ℂ)
75	57, 8	sstrid 3945	. . . . . . . 8 ⊢ (𝜑 → (𝐵(,)𝐶) ⊆ ℂ)
76	75	sselda 3934	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → 𝑥 ∈ ℂ)
77	74, 76	mulcld 11195	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → (𝐴 · 𝑥) ∈ ℂ)
78	77	coscld 16153	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → (cos‘(𝐴 · 𝑥)) ∈ ℂ)
79	69, 72, 73, 78	fvmptd 6977	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → ((ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)))‘𝑥) = (cos‘(𝐴 · 𝑥)))
80	79	eqcomd 2767	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → (cos‘(𝐴 · 𝑥)) = ((ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)))‘𝑥))
81	80	itgeq2dv 25831	. 2 ⊢ (𝜑 → ∫(𝐵(,)𝐶)(cos‘(𝐴 · 𝑥)) d𝑥 = ∫(𝐵(,)𝐶)((ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)))‘𝑥) d𝑥)
82		eqidd 2762	. . . . 5 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)) = (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)))
83		oveq2 7398	. . . . . . . 8 ⊢ (𝑦 = 𝐶 → (𝐴 · 𝑦) = (𝐴 · 𝐶))
84	83	fveq2d 6865	. . . . . . 7 ⊢ (𝑦 = 𝐶 → (sin‘(𝐴 · 𝑦)) = (sin‘(𝐴 · 𝐶)))
85	84	oveq1d 7405	. . . . . 6 ⊢ (𝑦 = 𝐶 → ((sin‘(𝐴 · 𝑦)) / 𝐴) = ((sin‘(𝐴 · 𝐶)) / 𝐴))
86	85	adantl 485	. . . . 5 ⊢ ((𝜑 ∧ 𝑦 = 𝐶) → ((sin‘(𝐴 · 𝑦)) / 𝐴) = ((sin‘(𝐴 · 𝐶)) / 𝐴))
87	1	rexrd 11225	. . . . . 6 ⊢ (𝜑 → 𝐵 ∈ ℝ^*)
88	2	rexrd 11225	. . . . . 6 ⊢ (𝜑 → 𝐶 ∈ ℝ^*)
89		itgcoscmulx.blec	. . . . . 6 ⊢ (𝜑 → 𝐵 ≤ 𝐶)
90		ubicc2 13462	. . . . . 6 ⊢ ((𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^* ∧ 𝐵 ≤ 𝐶) → 𝐶 ∈ (𝐵[,]𝐶))
91	87, 88, 89, 90	syl3anc 1389	. . . . 5 ⊢ (𝜑 → 𝐶 ∈ (𝐵[,]𝐶))
92	2	recnd 11203	. . . . . . . 8 ⊢ (𝜑 → 𝐶 ∈ ℂ)
93	10, 92	mulcld 11195	. . . . . . 7 ⊢ (𝜑 → (𝐴 · 𝐶) ∈ ℂ)
94	93	sincld 16152	. . . . . 6 ⊢ (𝜑 → (sin‘(𝐴 · 𝐶)) ∈ ℂ)
95	94, 10, 15	divcld 11960	. . . . 5 ⊢ (𝜑 → ((sin‘(𝐴 · 𝐶)) / 𝐴) ∈ ℂ)
96	82, 86, 91, 95	fvmptd 6977	. . . 4 ⊢ (𝜑 → ((𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))‘𝐶) = ((sin‘(𝐴 · 𝐶)) / 𝐴))
97		oveq2 7398	. . . . . . . 8 ⊢ (𝑦 = 𝐵 → (𝐴 · 𝑦) = (𝐴 · 𝐵))
98	97	fveq2d 6865	. . . . . . 7 ⊢ (𝑦 = 𝐵 → (sin‘(𝐴 · 𝑦)) = (sin‘(𝐴 · 𝐵)))
99	98	oveq1d 7405	. . . . . 6 ⊢ (𝑦 = 𝐵 → ((sin‘(𝐴 · 𝑦)) / 𝐴) = ((sin‘(𝐴 · 𝐵)) / 𝐴))
100	99	adantl 485	. . . . 5 ⊢ ((𝜑 ∧ 𝑦 = 𝐵) → ((sin‘(𝐴 · 𝑦)) / 𝐴) = ((sin‘(𝐴 · 𝐵)) / 𝐴))
101		lbicc2 13461	. . . . . 6 ⊢ ((𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^* ∧ 𝐵 ≤ 𝐶) → 𝐵 ∈ (𝐵[,]𝐶))
102	87, 88, 89, 101	syl3anc 1389	. . . . 5 ⊢ (𝜑 → 𝐵 ∈ (𝐵[,]𝐶))
103	1	recnd 11203	. . . . . . . 8 ⊢ (𝜑 → 𝐵 ∈ ℂ)
104	10, 103	mulcld 11195	. . . . . . 7 ⊢ (𝜑 → (𝐴 · 𝐵) ∈ ℂ)
105	104	sincld 16152	. . . . . 6 ⊢ (𝜑 → (sin‘(𝐴 · 𝐵)) ∈ ℂ)
106	105, 10, 15	divcld 11960	. . . . 5 ⊢ (𝜑 → ((sin‘(𝐴 · 𝐵)) / 𝐴) ∈ ℂ)
107	82, 100, 102, 106	fvmptd 6977	. . . 4 ⊢ (𝜑 → ((𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))‘𝐵) = ((sin‘(𝐴 · 𝐵)) / 𝐴))
108	96, 107	oveq12d 7408	. . 3 ⊢ (𝜑 → (((𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))‘𝐶) − ((𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))‘𝐵)) = (((sin‘(𝐴 · 𝐶)) / 𝐴) − ((sin‘(𝐴 · 𝐵)) / 𝐴)))
109		coscn 26495	. . . . . . 7 ⊢ cos ∈ (ℂ–cn→ℂ)
110	109	a1i 11	. . . . . 6 ⊢ (𝜑 → cos ∈ (ℂ–cn→ℂ))
111	75, 10, 36	constcncfg 46406	. . . . . . 7 ⊢ (𝜑 → (𝑦 ∈ (𝐵(,)𝐶) ↦ 𝐴) ∈ ((𝐵(,)𝐶)–cn→ℂ))
112	75, 36	idcncfg 46407	. . . . . . 7 ⊢ (𝜑 → (𝑦 ∈ (𝐵(,)𝐶) ↦ 𝑦) ∈ ((𝐵(,)𝐶)–cn→ℂ))
113	111, 112	mulcncf 25495	. . . . . 6 ⊢ (𝜑 → (𝑦 ∈ (𝐵(,)𝐶) ↦ (𝐴 · 𝑦)) ∈ ((𝐵(,)𝐶)–cn→ℂ))
114	110, 113	cncfmpt1f 24963	. . . . 5 ⊢ (𝜑 → (𝑦 ∈ (𝐵(,)𝐶) ↦ (cos‘(𝐴 · 𝑦))) ∈ ((𝐵(,)𝐶)–cn→ℂ))
115	68, 114	eqeltrd 2861	. . . 4 ⊢ (𝜑 → (ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))) ∈ ((𝐵(,)𝐶)–cn→ℂ))
116		ioossicc 13430	. . . . . . 7 ⊢ (𝐵(,)𝐶) ⊆ (𝐵[,]𝐶)
117	116	a1i 11	. . . . . 6 ⊢ (𝜑 → (𝐵(,)𝐶) ⊆ (𝐵[,]𝐶))
118		ioombl 25614	. . . . . . 7 ⊢ (𝐵(,)𝐶) ∈ dom vol
119	118	a1i 11	. . . . . 6 ⊢ (𝜑 → (𝐵(,)𝐶) ∈ dom vol)
120	10	adantr 484	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐵[,]𝐶)) → 𝐴 ∈ ℂ)
121	3, 7	sstrdi 3946	. . . . . . . . 9 ⊢ (𝜑 → (𝐵[,]𝐶) ⊆ ℂ)
122	121	sselda 3934	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐵[,]𝐶)) → 𝑦 ∈ ℂ)
123	120, 122	mulcld 11195	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐵[,]𝐶)) → (𝐴 · 𝑦) ∈ ℂ)
124	123	coscld 16153	. . . . . 6 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐵[,]𝐶)) → (cos‘(𝐴 · 𝑦)) ∈ ℂ)
125	121, 10, 36	constcncfg 46406	. . . . . . . . 9 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ 𝐴) ∈ ((𝐵[,]𝐶)–cn→ℂ))
126	121, 36	idcncfg 46407	. . . . . . . . 9 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ 𝑦) ∈ ((𝐵[,]𝐶)–cn→ℂ))
127	125, 126	mulcncf 25495	. . . . . . . 8 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ (𝐴 · 𝑦)) ∈ ((𝐵[,]𝐶)–cn→ℂ))
128	110, 127	cncfmpt1f 24963	. . . . . . 7 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ (cos‘(𝐴 · 𝑦))) ∈ ((𝐵[,]𝐶)–cn→ℂ))
129		cniccibl 25890	. . . . . . 7 ⊢ ((𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ ∧ (𝑦 ∈ (𝐵[,]𝐶) ↦ (cos‘(𝐴 · 𝑦))) ∈ ((𝐵[,]𝐶)–cn→ℂ)) → (𝑦 ∈ (𝐵[,]𝐶) ↦ (cos‘(𝐴 · 𝑦))) ∈ 𝐿¹)
130	1, 2, 128, 129	syl3anc 1389	. . . . . 6 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ (cos‘(𝐴 · 𝑦))) ∈ 𝐿¹)
131	117, 119, 124, 130	iblss 25854	. . . . 5 ⊢ (𝜑 → (𝑦 ∈ (𝐵(,)𝐶) ↦ (cos‘(𝐴 · 𝑦))) ∈ 𝐿¹)
132	68, 131	eqeltrd 2861	. . . 4 ⊢ (𝜑 → (ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))) ∈ 𝐿¹)
133		sincn 26494	. . . . . . 7 ⊢ sin ∈ (ℂ–cn→ℂ)
134	133	a1i 11	. . . . . 6 ⊢ (𝜑 → sin ∈ (ℂ–cn→ℂ))
135	134, 127	cncfmpt1f 24963	. . . . 5 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ (sin‘(𝐴 · 𝑦))) ∈ ((𝐵[,]𝐶)–cn→ℂ))
136		neneq 2962	. . . . . . . 8 ⊢ (𝐴 ≠ 0 → ¬ 𝐴 = 0)
137		elsni 4596	. . . . . . . . 9 ⊢ (𝐴 ∈ {0} → 𝐴 = 0)
138	137	con3i 154	. . . . . . . 8 ⊢ (¬ 𝐴 = 0 → ¬ 𝐴 ∈ {0})
139	15, 136, 138	3syl 18	. . . . . . 7 ⊢ (𝜑 → ¬ 𝐴 ∈ {0})
140	10, 139	eldifd 3913	. . . . . 6 ⊢ (𝜑 → 𝐴 ∈ (ℂ ∖ {0}))
141		difssd 4088	. . . . . 6 ⊢ (𝜑 → (ℂ ∖ {0}) ⊆ ℂ)
142	121, 140, 141	constcncfg 46406	. . . . 5 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ 𝐴) ∈ ((𝐵[,]𝐶)–cn→(ℂ ∖ {0})))
143	135, 142	divcncf 25496	. . . 4 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)) ∈ ((𝐵[,]𝐶)–cn→ℂ))
144	1, 2, 89, 115, 132, 143	ftc2 26093	. . 3 ⊢ (𝜑 → ∫(𝐵(,)𝐶)((ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)))‘𝑥) d𝑥 = (((𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))‘𝐶) − ((𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))‘𝐵)))
145	94, 105, 10, 15	divsubdird 11999	. . 3 ⊢ (𝜑 → (((sin‘(𝐴 · 𝐶)) − (sin‘(𝐴 · 𝐵))) / 𝐴) = (((sin‘(𝐴 · 𝐶)) / 𝐴) − ((sin‘(𝐴 · 𝐵)) / 𝐴)))
146	108, 144, 145	3eqtr4d 2806	. 2 ⊢ (𝜑 → ∫(𝐵(,)𝐶)((ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)))‘𝑥) d𝑥 = (((sin‘(𝐴 · 𝐶)) − (sin‘(𝐴 · 𝐵))) / 𝐴))
147	81, 146	eqtrd 2796	1 ⊢ (𝜑 → ∫(𝐵(,)𝐶)(cos‘(𝐴 · 𝑥)) d𝑥 = (((sin‘(𝐴 · 𝐶)) − (sin‘(𝐴 · 𝐵))) / 𝐴))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ∧ wa 399 = wceq 1559 ∈ wcel 2141 ≠ wne 2956 ∀wral 3075 ∖ cdif 3899 ⊆ wss 3902 {csn 4579 {cpr 4581 class class class wbr 5097 ↦ cmpt 5178 dom cdm 5643 ran crn 5644 ↾ cres 5645 ⟶wf 6511 ‘cfv 6515 (class class class)co 7390 ℂcc 11064 ℝcr 11065 0cc0 11066 · cmul 11071 ℝ^*cxr 11208 ≤ cle 11210 − cmin 11407 / cdiv 11837 (,)cioo 13342 [,]cicc 13345 sincsin 16083 cosccos 16084 TopOpenctopn 17440 topGenctg 17456 ℂ_fldccnfld 21411 intcnt 23064 –cn→ccncf 24925 volcvol 25512 𝐿¹cibl 25666 ∫citg 25667 D cdv 25912

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-rep 5224 ax-sep 5243 ax-nul 5253 ax-pow 5319 ax-pr 5387 ax-un 7712 ax-inf2 9589 ax-cc 10385 ax-cnex 11122 ax-resscn 11123 ax-1cn 11124 ax-icn 11125 ax-addcl 11126 ax-addrcl 11127 ax-mulcl 11128 ax-mulrcl 11129 ax-mulcom 11130 ax-addass 11131 ax-mulass 11132 ax-distr 11133 ax-i2m1 11134 ax-1ne0 11135 ax-1rid 11136 ax-rnegex 11137 ax-rrecex 11138 ax-cnre 11139 ax-pre-lttri 11140 ax-pre-lttrn 11141 ax-pre-ltadd 11142 ax-pre-mulgt0 11143 ax-pre-sup 11144 ax-addf 11145

This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3061 df-ral 3076 df-rex 3086 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-symdif 4203 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4580 df-pr 4582 df-tp 4584 df-op 4586 df-uni 4863 df-int 4903 df-iun 4948 df-iin 4949 df-disj 5065 df-br 5098 df-opab 5160 df-mpt 5179 df-tr 5205 df-id 5538 df-eprel 5543 df-po 5551 df-so 5552 df-fr 5596 df-se 5597 df-we 5598 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-rn 5654 df-res 5655 df-ima 5656 df-pred 6282 df-ord 6343 df-on 6344 df-lim 6345 df-suc 6346 df-iota 6471 df-fun 6517 df-fn 6518 df-f 6519 df-f1 6520 df-fo 6521 df-f1o 6522 df-fv 6523 df-isom 6524 df-riota 7347 df-ov 7393 df-oprab 7394 df-mpo 7395 df-of 7654 df-ofr 7655 df-om 7841 df-1st 7964 df-2nd 7965 df-supp 8134 df-frecs 8255 df-wrecs 8286 df-recs 8335 df-rdg 8374 df-1o 8430 df-2o 8431 df-oadd 8434 df-omul 8435 df-er 8671 df-map 8803 df-pm 8804 df-ixp 8873 df-en 8921 df-dom 8922 df-sdom 8923 df-fin 8924 df-fsupp 9301 df-fi 9350 df-sup 9381 df-inf 9382 df-oi 9451 df-dju 9852 df-card 9890 df-acn 9893 df-pnf 11211 df-mnf 11212 df-xr 11213 df-ltxr 11214 df-le 11215 df-sub 11409 df-neg 11410 df-div 11838 df-nn 12204 df-2 12273 df-3 12274 df-4 12275 df-5 12276 df-6 12277 df-7 12278 df-8 12279 df-9 12280 df-n0 12475 df-z 12562 df-dec 12682 df-uz 12833 df-q 12943 df-rp 12987 df-xneg 13107 df-xadd 13108 df-xmul 13109 df-ioo 13346 df-ioc 13347 df-ico 13348 df-icc 13349 df-fz 13506 df-fzo 13653 df-fl 13795 df-mod 13873 df-seq 14008 df-exp 14068 df-fac 14280 df-bc 14309 df-hash 14337 df-shft 15073 df-cj 15116 df-re 15117 df-im 15118 df-sqrt 15252 df-abs 15253 df-limsup 15488 df-clim 15505 df-rlim 15506 df-sum 15704 df-ef 16087 df-sin 16089 df-cos 16090 df-struct 17173 df-sets 17190 df-slot 17208 df-ndx 17220 df-base 17236 df-ress 17257 df-plusg 17289 df-mulr 17290 df-starv 17291 df-sca 17292 df-vsca 17293 df-ip 17294 df-tset 17295 df-ple 17296 df-ds 17298 df-unif 17299 df-hom 17300 df-cco 17301 df-rest 17441 df-topn 17442 df-0g 17460 df-gsum 17461 df-topgen 17462 df-pt 17463 df-prds 17466 df-xrs 17522 df-qtop 17527 df-imas 17528 df-xps 17530 df-mre 17604 df-mrc 17605 df-acs 17607 df-mgm 18664 df-sgrp 18743 df-mnd 18759 df-submnd 18808 df-mulg 19100 df-cntz 19347 df-cmn 19812 df-psmet 21403 df-xmet 21404 df-met 21405 df-bl 21406 df-mopn 21407 df-fbas 21408 df-fg 21409 df-cnfld 21412 df-top 22941 df-topon 22958 df-topsp 22980 df-bases 22993 df-cld 23066 df-ntr 23067 df-cls 23068 df-nei 23145 df-lp 23183 df-perf 23184 df-cn 23274 df-cnp 23275 df-haus 23362 df-cmp 23434 df-tx 23609 df-hmeo 23802 df-fil 23893 df-fm 23985 df-flim 23986 df-flf 23987 df-xms 24367 df-ms 24368 df-tms 24369 df-cncf 24927 df-ovol 25513 df-vol 25514 df-mbf 25668 df-itg1 25669 df-itg2 25670 df-ibl 25671 df-itg 25672 df-0p 25719 df-limc 25915 df-dv 25916

This theorem is referenced by: sqwvfoura 46762

W3C validator