itgcoscmulx - Mathbox for Glauco Siliprandi

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Theorem itgcoscmulx 45954

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 13355	. . . . . . . . . 10 ⊢ (𝜑 → (𝐵[,]𝐶) ⊆ ℝ)
4	3	resmptd 5995	. . . . . . . . 9 ⊢ (𝜑 → ((𝑦 ∈ ℝ ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)) ↾ (𝐵[,]𝐶)) = (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)))
5	4	eqcomd 2735	. . . . . . . 8 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)) = ((𝑦 ∈ ℝ ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)) ↾ (𝐵[,]𝐶)))
6	5	oveq2d 7369	. . . . . . 7 ⊢ (𝜑 → (ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))) = (ℝ D ((𝑦 ∈ ℝ ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)) ↾ (𝐵[,]𝐶))))
7		ax-resscn 11085	. . . . . . . . 9 ⊢ ℝ ⊆ ℂ
8	7	a1i 11	. . . . . . . 8 ⊢ (𝜑 → ℝ ⊆ ℂ)
9	8	sselda 3937	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ) → 𝑦 ∈ ℂ)
10		itgcoscmulx.a	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝐴 ∈ ℂ)
11	10	adantr 480	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → 𝐴 ∈ ℂ)
12		simpr 484	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → 𝑦 ∈ ℂ)
13	11, 12	mulcld 11154	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → (𝐴 · 𝑦) ∈ ℂ)
14	13	sincld 16057	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → (sin‘(𝐴 · 𝑦)) ∈ ℂ)
15		itgcoscmulx.an0	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐴 ≠ 0)
16	15	adantr 480	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → 𝐴 ≠ 0)
17	14, 11, 16	divcld 11918	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → ((sin‘(𝐴 · 𝑦)) / 𝐴) ∈ ℂ)
18	9, 17	syldan 591	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ) → ((sin‘(𝐴 · 𝑦)) / 𝐴) ∈ ℂ)
19	18	fmpttd 7053	. . . . . . . 8 ⊢ (𝜑 → (𝑦 ∈ ℝ ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)):ℝ⟶ℂ)
20		ssidd 3961	. . . . . . . 8 ⊢ (𝜑 → ℝ ⊆ ℝ)
21		eqid 2729	. . . . . . . . 9 ⊢ (TopOpen‘ℂ_fld) = (TopOpen‘ℂ_fld)
22		tgioo4 24709	. . . . . . . . 9 ⊢ (topGen‘ran (,)) = ((TopOpen‘ℂ_fld) ↾_t ℝ)
23	21, 22	dvres 25828	. . . . . . . 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 838	. . . . . . 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 11120	. . . . . . . . . . 11 ⊢ ℝ ∈ {ℝ, ℂ}
26	25	a1i 11	. . . . . . . . . 10 ⊢ (𝜑 → ℝ ∈ {ℝ, ℂ})
27	9, 14	syldan 591	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ) → (sin‘(𝐴 · 𝑦)) ∈ ℂ)
28	10	adantr 480	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ) → 𝐴 ∈ ℂ)
29	28, 9	mulcld 11154	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ) → (𝐴 · 𝑦) ∈ ℂ)
30	29	coscld 16058	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ) → (cos‘(𝐴 · 𝑦)) ∈ ℂ)
31	28, 30	mulcld 11154	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ) → (𝐴 · (cos‘(𝐴 · 𝑦))) ∈ ℂ)
32	8	resmptd 5995	. . . . . . . . . . . . 13 ⊢ (𝜑 → ((𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦))) ↾ ℝ) = (𝑦 ∈ ℝ ↦ (sin‘(𝐴 · 𝑦))))
33	32	eqcomd 2735	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝑦 ∈ ℝ ↦ (sin‘(𝐴 · 𝑦))) = ((𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦))) ↾ ℝ))
34	33	oveq2d 7369	. . . . . . . . . . 11 ⊢ (𝜑 → (ℝ D (𝑦 ∈ ℝ ↦ (sin‘(𝐴 · 𝑦)))) = (ℝ D ((𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦))) ↾ ℝ)))
35	14	fmpttd 7053	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦))):ℂ⟶ℂ)
36		ssidd 3961	. . . . . . . . . . . . 13 ⊢ (𝜑 → ℂ ⊆ ℂ)
37		dvsinax 45898	. . . . . . . . . . . . . . . . 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 5852	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → dom (ℂ D (𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦)))) = dom (𝑦 ∈ ℂ ↦ (𝐴 · (cos‘(𝐴 · 𝑦)))))
40	13	coscld 16058	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → (cos‘(𝐴 · 𝑦)) ∈ ℂ)
41	11, 40	mulcld 11154	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → (𝐴 · (cos‘(𝐴 · 𝑦))) ∈ ℂ)
42	41	ralrimiva 3121	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → ∀𝑦 ∈ ℂ (𝐴 · (cos‘(𝐴 · 𝑦))) ∈ ℂ)
43		dmmptg 6195	. . . . . . . . . . . . . . . 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 2765	. . . . . . . . . . . . . 14 ⊢ (𝜑 → ℂ = dom (ℂ D (𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦)))))
46	7, 45	sseqtrid 3980	. . . . . . . . . . . . 13 ⊢ (𝜑 → ℝ ⊆ dom (ℂ D (𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦)))))
47		dvres3 25830	. . . . . . . . . . . . 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 838	. . . . . . . . . . . 12 ⊢ (𝜑 → (ℝ D ((𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦))) ↾ ℝ)) = ((ℂ D (𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦)))) ↾ ℝ))
49	38	reseq1d 5933	. . . . . . . . . . . 12 ⊢ (𝜑 → ((ℂ D (𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦)))) ↾ ℝ) = ((𝑦 ∈ ℂ ↦ (𝐴 · (cos‘(𝐴 · 𝑦)))) ↾ ℝ))
50	8	resmptd 5995	. . . . . . . . . . . 12 ⊢ (𝜑 → ((𝑦 ∈ ℂ ↦ (𝐴 · (cos‘(𝐴 · 𝑦)))) ↾ ℝ) = (𝑦 ∈ ℝ ↦ (𝐴 · (cos‘(𝐴 · 𝑦)))))
51	48, 49, 50	3eqtrd 2768	. . . . . . . . . . 11 ⊢ (𝜑 → (ℝ D ((𝑦 ∈ ℂ ↦ (sin‘(𝐴 · 𝑦))) ↾ ℝ)) = (𝑦 ∈ ℝ ↦ (𝐴 · (cos‘(𝐴 · 𝑦)))))
52	34, 51	eqtrd 2764	. . . . . . . . . 10 ⊢ (𝜑 → (ℝ D (𝑦 ∈ ℝ ↦ (sin‘(𝐴 · 𝑦)))) = (𝑦 ∈ ℝ ↦ (𝐴 · (cos‘(𝐴 · 𝑦)))))
53	26, 27, 31, 52, 10, 15	dvmptdivc 25885	. . . . . . . . 9 ⊢ (𝜑 → (ℝ D (𝑦 ∈ ℝ ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))) = (𝑦 ∈ ℝ ↦ ((𝐴 · (cos‘(𝐴 · 𝑦))) / 𝐴)))
54		iccntr 24726	. . . . . . . . . 10 ⊢ ((𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → ((int‘(topGen‘ran (,)))‘(𝐵[,]𝐶)) = (𝐵(,)𝐶))
55	1, 2, 54	syl2anc 584	. . . . . . . . 9 ⊢ (𝜑 → ((int‘(topGen‘ran (,)))‘(𝐵[,]𝐶)) = (𝐵(,)𝐶))
56	53, 55	reseq12d 5935	. . . . . . . 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 13328	. . . . . . . . 9 ⊢ (𝐵(,)𝐶) ⊆ ℝ
58		resmpt 5992	. . . . . . . . 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 13296	. . . . . . . . . . . 12 ⊢ (𝑦 ∈ (𝐵(,)𝐶) → 𝑦 ∈ ℝ)
61	60	recnd 11162	. . . . . . . . . . 11 ⊢ (𝑦 ∈ (𝐵(,)𝐶) → 𝑦 ∈ ℂ)
62	61, 40	sylan2 593	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐵(,)𝐶)) → (cos‘(𝐴 · 𝑦)) ∈ ℂ)
63	10	adantr 480	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐵(,)𝐶)) → 𝐴 ∈ ℂ)
64	15	adantr 480	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐵(,)𝐶)) → 𝐴 ≠ 0)
65	62, 63, 64	divcan3d 11923	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐵(,)𝐶)) → ((𝐴 · (cos‘(𝐴 · 𝑦))) / 𝐴) = (cos‘(𝐴 · 𝑦)))
66	65	mpteq2dva 5188	. . . . . . . 8 ⊢ (𝜑 → (𝑦 ∈ (𝐵(,)𝐶) ↦ ((𝐴 · (cos‘(𝐴 · 𝑦))) / 𝐴)) = (𝑦 ∈ (𝐵(,)𝐶) ↦ (cos‘(𝐴 · 𝑦))))
67	56, 59, 66	3eqtrd 2768	. . . . . . 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 2768	. . . . . 6 ⊢ (𝜑 → (ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))) = (𝑦 ∈ (𝐵(,)𝐶) ↦ (cos‘(𝐴 · 𝑦))))
69	68	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → (ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))) = (𝑦 ∈ (𝐵(,)𝐶) ↦ (cos‘(𝐴 · 𝑦))))
70		oveq2 7361	. . . . . . 7 ⊢ (𝑦 = 𝑥 → (𝐴 · 𝑦) = (𝐴 · 𝑥))
71	70	fveq2d 6830	. . . . . 6 ⊢ (𝑦 = 𝑥 → (cos‘(𝐴 · 𝑦)) = (cos‘(𝐴 · 𝑥)))
72	71	adantl 481	. . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) ∧ 𝑦 = 𝑥) → (cos‘(𝐴 · 𝑦)) = (cos‘(𝐴 · 𝑥)))
73		simpr 484	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → 𝑥 ∈ (𝐵(,)𝐶))
74	10	adantr 480	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → 𝐴 ∈ ℂ)
75	57, 8	sstrid 3949	. . . . . . . 8 ⊢ (𝜑 → (𝐵(,)𝐶) ⊆ ℂ)
76	75	sselda 3937	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → 𝑥 ∈ ℂ)
77	74, 76	mulcld 11154	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → (𝐴 · 𝑥) ∈ ℂ)
78	77	coscld 16058	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → (cos‘(𝐴 · 𝑥)) ∈ ℂ)
79	69, 72, 73, 78	fvmptd 6941	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → ((ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)))‘𝑥) = (cos‘(𝐴 · 𝑥)))
80	79	eqcomd 2735	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐵(,)𝐶)) → (cos‘(𝐴 · 𝑥)) = ((ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)))‘𝑥))
81	80	itgeq2dv 25699	. 2 ⊢ (𝜑 → ∫(𝐵(,)𝐶)(cos‘(𝐴 · 𝑥)) d𝑥 = ∫(𝐵(,)𝐶)((ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)))‘𝑥) d𝑥)
82		eqidd 2730	. . . . 5 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)) = (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)))
83		oveq2 7361	. . . . . . . 8 ⊢ (𝑦 = 𝐶 → (𝐴 · 𝑦) = (𝐴 · 𝐶))
84	83	fveq2d 6830	. . . . . . 7 ⊢ (𝑦 = 𝐶 → (sin‘(𝐴 · 𝑦)) = (sin‘(𝐴 · 𝐶)))
85	84	oveq1d 7368	. . . . . 6 ⊢ (𝑦 = 𝐶 → ((sin‘(𝐴 · 𝑦)) / 𝐴) = ((sin‘(𝐴 · 𝐶)) / 𝐴))
86	85	adantl 481	. . . . 5 ⊢ ((𝜑 ∧ 𝑦 = 𝐶) → ((sin‘(𝐴 · 𝑦)) / 𝐴) = ((sin‘(𝐴 · 𝐶)) / 𝐴))
87	1	rexrd 11184	. . . . . 6 ⊢ (𝜑 → 𝐵 ∈ ℝ^*)
88	2	rexrd 11184	. . . . . 6 ⊢ (𝜑 → 𝐶 ∈ ℝ^*)
89		itgcoscmulx.blec	. . . . . 6 ⊢ (𝜑 → 𝐵 ≤ 𝐶)
90		ubicc2 13386	. . . . . 6 ⊢ ((𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^* ∧ 𝐵 ≤ 𝐶) → 𝐶 ∈ (𝐵[,]𝐶))
91	87, 88, 89, 90	syl3anc 1373	. . . . 5 ⊢ (𝜑 → 𝐶 ∈ (𝐵[,]𝐶))
92	2	recnd 11162	. . . . . . . 8 ⊢ (𝜑 → 𝐶 ∈ ℂ)
93	10, 92	mulcld 11154	. . . . . . 7 ⊢ (𝜑 → (𝐴 · 𝐶) ∈ ℂ)
94	93	sincld 16057	. . . . . 6 ⊢ (𝜑 → (sin‘(𝐴 · 𝐶)) ∈ ℂ)
95	94, 10, 15	divcld 11918	. . . . 5 ⊢ (𝜑 → ((sin‘(𝐴 · 𝐶)) / 𝐴) ∈ ℂ)
96	82, 86, 91, 95	fvmptd 6941	. . . 4 ⊢ (𝜑 → ((𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))‘𝐶) = ((sin‘(𝐴 · 𝐶)) / 𝐴))
97		oveq2 7361	. . . . . . . 8 ⊢ (𝑦 = 𝐵 → (𝐴 · 𝑦) = (𝐴 · 𝐵))
98	97	fveq2d 6830	. . . . . . 7 ⊢ (𝑦 = 𝐵 → (sin‘(𝐴 · 𝑦)) = (sin‘(𝐴 · 𝐵)))
99	98	oveq1d 7368	. . . . . 6 ⊢ (𝑦 = 𝐵 → ((sin‘(𝐴 · 𝑦)) / 𝐴) = ((sin‘(𝐴 · 𝐵)) / 𝐴))
100	99	adantl 481	. . . . 5 ⊢ ((𝜑 ∧ 𝑦 = 𝐵) → ((sin‘(𝐴 · 𝑦)) / 𝐴) = ((sin‘(𝐴 · 𝐵)) / 𝐴))
101		lbicc2 13385	. . . . . 6 ⊢ ((𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^* ∧ 𝐵 ≤ 𝐶) → 𝐵 ∈ (𝐵[,]𝐶))
102	87, 88, 89, 101	syl3anc 1373	. . . . 5 ⊢ (𝜑 → 𝐵 ∈ (𝐵[,]𝐶))
103	1	recnd 11162	. . . . . . . 8 ⊢ (𝜑 → 𝐵 ∈ ℂ)
104	10, 103	mulcld 11154	. . . . . . 7 ⊢ (𝜑 → (𝐴 · 𝐵) ∈ ℂ)
105	104	sincld 16057	. . . . . 6 ⊢ (𝜑 → (sin‘(𝐴 · 𝐵)) ∈ ℂ)
106	105, 10, 15	divcld 11918	. . . . 5 ⊢ (𝜑 → ((sin‘(𝐴 · 𝐵)) / 𝐴) ∈ ℂ)
107	82, 100, 102, 106	fvmptd 6941	. . . 4 ⊢ (𝜑 → ((𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))‘𝐵) = ((sin‘(𝐴 · 𝐵)) / 𝐴))
108	96, 107	oveq12d 7371	. . 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 26371	. . . . . . 7 ⊢ cos ∈ (ℂ–cn→ℂ)
110	109	a1i 11	. . . . . 6 ⊢ (𝜑 → cos ∈ (ℂ–cn→ℂ))
111	75, 10, 36	constcncfg 45857	. . . . . . 7 ⊢ (𝜑 → (𝑦 ∈ (𝐵(,)𝐶) ↦ 𝐴) ∈ ((𝐵(,)𝐶)–cn→ℂ))
112	75, 36	idcncfg 45858	. . . . . . 7 ⊢ (𝜑 → (𝑦 ∈ (𝐵(,)𝐶) ↦ 𝑦) ∈ ((𝐵(,)𝐶)–cn→ℂ))
113	111, 112	mulcncf 25362	. . . . . 6 ⊢ (𝜑 → (𝑦 ∈ (𝐵(,)𝐶) ↦ (𝐴 · 𝑦)) ∈ ((𝐵(,)𝐶)–cn→ℂ))
114	110, 113	cncfmpt1f 24823	. . . . 5 ⊢ (𝜑 → (𝑦 ∈ (𝐵(,)𝐶) ↦ (cos‘(𝐴 · 𝑦))) ∈ ((𝐵(,)𝐶)–cn→ℂ))
115	68, 114	eqeltrd 2828	. . . 4 ⊢ (𝜑 → (ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))) ∈ ((𝐵(,)𝐶)–cn→ℂ))
116		ioossicc 13354	. . . . . . 7 ⊢ (𝐵(,)𝐶) ⊆ (𝐵[,]𝐶)
117	116	a1i 11	. . . . . 6 ⊢ (𝜑 → (𝐵(,)𝐶) ⊆ (𝐵[,]𝐶))
118		ioombl 25482	. . . . . . 7 ⊢ (𝐵(,)𝐶) ∈ dom vol
119	118	a1i 11	. . . . . 6 ⊢ (𝜑 → (𝐵(,)𝐶) ∈ dom vol)
120	10	adantr 480	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐵[,]𝐶)) → 𝐴 ∈ ℂ)
121	3, 7	sstrdi 3950	. . . . . . . . 9 ⊢ (𝜑 → (𝐵[,]𝐶) ⊆ ℂ)
122	121	sselda 3937	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐵[,]𝐶)) → 𝑦 ∈ ℂ)
123	120, 122	mulcld 11154	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐵[,]𝐶)) → (𝐴 · 𝑦) ∈ ℂ)
124	123	coscld 16058	. . . . . 6 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐵[,]𝐶)) → (cos‘(𝐴 · 𝑦)) ∈ ℂ)
125	121, 10, 36	constcncfg 45857	. . . . . . . . 9 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ 𝐴) ∈ ((𝐵[,]𝐶)–cn→ℂ))
126	121, 36	idcncfg 45858	. . . . . . . . 9 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ 𝑦) ∈ ((𝐵[,]𝐶)–cn→ℂ))
127	125, 126	mulcncf 25362	. . . . . . . 8 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ (𝐴 · 𝑦)) ∈ ((𝐵[,]𝐶)–cn→ℂ))
128	110, 127	cncfmpt1f 24823	. . . . . . 7 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ (cos‘(𝐴 · 𝑦))) ∈ ((𝐵[,]𝐶)–cn→ℂ))
129		cniccibl 25758	. . . . . . 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 1373	. . . . . 6 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ (cos‘(𝐴 · 𝑦))) ∈ 𝐿¹)
131	117, 119, 124, 130	iblss 25722	. . . . 5 ⊢ (𝜑 → (𝑦 ∈ (𝐵(,)𝐶) ↦ (cos‘(𝐴 · 𝑦))) ∈ 𝐿¹)
132	68, 131	eqeltrd 2828	. . . 4 ⊢ (𝜑 → (ℝ D (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴))) ∈ 𝐿¹)
133		sincn 26370	. . . . . . 7 ⊢ sin ∈ (ℂ–cn→ℂ)
134	133	a1i 11	. . . . . 6 ⊢ (𝜑 → sin ∈ (ℂ–cn→ℂ))
135	134, 127	cncfmpt1f 24823	. . . . 5 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ (sin‘(𝐴 · 𝑦))) ∈ ((𝐵[,]𝐶)–cn→ℂ))
136		neneq 2931	. . . . . . . 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 3916	. . . . . 6 ⊢ (𝜑 → 𝐴 ∈ (ℂ ∖ {0}))
141		difssd 4090	. . . . . 6 ⊢ (𝜑 → (ℂ ∖ {0}) ⊆ ℂ)
142	121, 140, 141	constcncfg 45857	. . . . 5 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ 𝐴) ∈ ((𝐵[,]𝐶)–cn→(ℂ ∖ {0})))
143	135, 142	divcncf 25364	. . . 4 ⊢ (𝜑 → (𝑦 ∈ (𝐵[,]𝐶) ↦ ((sin‘(𝐴 · 𝑦)) / 𝐴)) ∈ ((𝐵[,]𝐶)–cn→ℂ))
144	1, 2, 89, 115, 132, 143	ftc2 25967	. . 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 11957	. . 3 ⊢ (𝜑 → (((sin‘(𝐴 · 𝐶)) − (sin‘(𝐴 · 𝐵))) / 𝐴) = (((sin‘(𝐴 · 𝐶)) / 𝐴) − ((sin‘(𝐴 · 𝐵)) / 𝐴)))
146	108, 144, 145	3eqtr4d 2774	. 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 2764	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 395 = wceq 1540 ∈ wcel 2109 ≠ wne 2925 ∀wral 3044 ∖ cdif 3902 ⊆ wss 3905 {csn 4579 {cpr 4581 class class class wbr 5095 ↦ cmpt 5176 dom cdm 5623 ran crn 5624 ↾ cres 5625 ⟶wf 6482 ‘cfv 6486 (class class class)co 7353 ℂcc 11026 ℝcr 11027 0cc0 11028 · cmul 11033 ℝ^*cxr 11167 ≤ cle 11169 − cmin 11365 / cdiv 11795 (,)cioo 13266 [,]cicc 13269 sincsin 15988 cosccos 15989 TopOpenctopn 17343 topGenctg 17359 ℂ_fldccnfld 21279 intcnt 22920 –cn→ccncf 24785 volcvol 25380 𝐿¹cibl 25534 ∫citg 25535 D cdv 25780

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5221 ax-sep 5238 ax-nul 5248 ax-pow 5307 ax-pr 5374 ax-un 7675 ax-inf2 9556 ax-cc 10348 ax-cnex 11084 ax-resscn 11085 ax-1cn 11086 ax-icn 11087 ax-addcl 11088 ax-addrcl 11089 ax-mulcl 11090 ax-mulrcl 11091 ax-mulcom 11092 ax-addass 11093 ax-mulass 11094 ax-distr 11095 ax-i2m1 11096 ax-1ne0 11097 ax-1rid 11098 ax-rnegex 11099 ax-rrecex 11100 ax-cnre 11101 ax-pre-lttri 11102 ax-pre-lttrn 11103 ax-pre-ltadd 11104 ax-pre-mulgt0 11105 ax-pre-sup 11106 ax-addf 11107

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-rmo 3345 df-reu 3346 df-rab 3397 df-v 3440 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-symdif 4206 df-nul 4287 df-if 4479 df-pw 4555 df-sn 4580 df-pr 4582 df-tp 4584 df-op 4586 df-uni 4862 df-int 4900 df-iun 4946 df-iin 4947 df-disj 5063 df-br 5096 df-opab 5158 df-mpt 5177 df-tr 5203 df-id 5518 df-eprel 5523 df-po 5531 df-so 5532 df-fr 5576 df-se 5577 df-we 5578 df-xp 5629 df-rel 5630 df-cnv 5631 df-co 5632 df-dm 5633 df-rn 5634 df-res 5635 df-ima 5636 df-pred 6253 df-ord 6314 df-on 6315 df-lim 6316 df-suc 6317 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-f1 6491 df-fo 6492 df-f1o 6493 df-fv 6494 df-isom 6495 df-riota 7310 df-ov 7356 df-oprab 7357 df-mpo 7358 df-of 7617 df-ofr 7618 df-om 7807 df-1st 7931 df-2nd 7932 df-supp 8101 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-1o 8395 df-2o 8396 df-oadd 8399 df-omul 8400 df-er 8632 df-map 8762 df-pm 8763 df-ixp 8832 df-en 8880 df-dom 8881 df-sdom 8882 df-fin 8883 df-fsupp 9271 df-fi 9320 df-sup 9351 df-inf 9352 df-oi 9421 df-dju 9816 df-card 9854 df-acn 9857 df-pnf 11170 df-mnf 11171 df-xr 11172 df-ltxr 11173 df-le 11174 df-sub 11367 df-neg 11368 df-div 11796 df-nn 12147 df-2 12209 df-3 12210 df-4 12211 df-5 12212 df-6 12213 df-7 12214 df-8 12215 df-9 12216 df-n0 12403 df-z 12490 df-dec 12610 df-uz 12754 df-q 12868 df-rp 12912 df-xneg 13032 df-xadd 13033 df-xmul 13034 df-ioo 13270 df-ioc 13271 df-ico 13272 df-icc 13273 df-fz 13429 df-fzo 13576 df-fl 13714 df-mod 13792 df-seq 13927 df-exp 13987 df-fac 14199 df-bc 14228 df-hash 14256 df-shft 14992 df-cj 15024 df-re 15025 df-im 15026 df-sqrt 15160 df-abs 15161 df-limsup 15396 df-clim 15413 df-rlim 15414 df-sum 15612 df-ef 15992 df-sin 15994 df-cos 15995 df-struct 17076 df-sets 17093 df-slot 17111 df-ndx 17123 df-base 17139 df-ress 17160 df-plusg 17192 df-mulr 17193 df-starv 17194 df-sca 17195 df-vsca 17196 df-ip 17197 df-tset 17198 df-ple 17199 df-ds 17201 df-unif 17202 df-hom 17203 df-cco 17204 df-rest 17344 df-topn 17345 df-0g 17363 df-gsum 17364 df-topgen 17365 df-pt 17366 df-prds 17369 df-xrs 17424 df-qtop 17429 df-imas 17430 df-xps 17432 df-mre 17506 df-mrc 17507 df-acs 17509 df-mgm 18532 df-sgrp 18611 df-mnd 18627 df-submnd 18676 df-mulg 18965 df-cntz 19214 df-cmn 19679 df-psmet 21271 df-xmet 21272 df-met 21273 df-bl 21274 df-mopn 21275 df-fbas 21276 df-fg 21277 df-cnfld 21280 df-top 22797 df-topon 22814 df-topsp 22836 df-bases 22849 df-cld 22922 df-ntr 22923 df-cls 22924 df-nei 23001 df-lp 23039 df-perf 23040 df-cn 23130 df-cnp 23131 df-haus 23218 df-cmp 23290 df-tx 23465 df-hmeo 23658 df-fil 23749 df-fm 23841 df-flim 23842 df-flf 23843 df-xms 24224 df-ms 24225 df-tms 24226 df-cncf 24787 df-ovol 25381 df-vol 25382 df-mbf 25536 df-itg1 25537 df-itg2 25538 df-ibl 25539 df-itg 25540 df-0p 25587 df-limc 25783 df-dv 25784

This theorem is referenced by: sqwvfoura 46213

W3C validator