dvcosax - Mathbox for Glauco Siliprandi

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Theorem dvcosax 44632

Description: Derivative exercise: the derivative with respect to x of cos(Ax), given a constant 𝐴. (Contributed by Glauco Siliprandi, 11-Dec-2019.)

**Assertion**
Ref	Expression
dvcosax	⊢ (𝐴 ∈ ℂ → (ℂ D (𝑥 ∈ ℂ ↦ (cos‘(𝐴 · 𝑥)))) = (𝑥 ∈ ℂ ↦ (𝐴 · -(sin‘(𝐴 · 𝑥)))))

Distinct variable group: 𝑥,𝐴

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

Step	Hyp	Ref	Expression
1		mulcl 11193	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝑥 ∈ ℂ) → (𝐴 · 𝑥) ∈ ℂ)
2		eqidd 2733	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)) = (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))
3		cosf 16067	. . . . . . . 8 ⊢ cos:ℂ⟶ℂ
4	3	a1i 11	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → cos:ℂ⟶ℂ)
5	4	feqmptd 6960	. . . . . 6 ⊢ (𝐴 ∈ ℂ → cos = (𝑦 ∈ ℂ ↦ (cos‘𝑦)))
6		fveq2 6891	. . . . . 6 ⊢ (𝑦 = (𝐴 · 𝑥) → (cos‘𝑦) = (cos‘(𝐴 · 𝑥)))
7	1, 2, 5, 6	fmptco 7126	. . . . 5 ⊢ (𝐴 ∈ ℂ → (cos ∘ (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))) = (𝑥 ∈ ℂ ↦ (cos‘(𝐴 · 𝑥))))
8	7	eqcomd 2738	. . . 4 ⊢ (𝐴 ∈ ℂ → (𝑥 ∈ ℂ ↦ (cos‘(𝐴 · 𝑥))) = (cos ∘ (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))))
9	8	oveq2d 7424	. . 3 ⊢ (𝐴 ∈ ℂ → (ℂ D (𝑥 ∈ ℂ ↦ (cos‘(𝐴 · 𝑥)))) = (ℂ D (cos ∘ (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))))
10		cnelprrecn 11202	. . . . 5 ⊢ ℂ ∈ {ℝ, ℂ}
11	10	a1i 11	. . . 4 ⊢ (𝐴 ∈ ℂ → ℂ ∈ {ℝ, ℂ})
12	1	fmpttd 7114	. . . 4 ⊢ (𝐴 ∈ ℂ → (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)):ℂ⟶ℂ)
13		dvcos 25499	. . . . . . 7 ⊢ (ℂ D cos) = (𝑥 ∈ ℂ ↦ -(sin‘𝑥))
14	13	dmeqi 5904	. . . . . 6 ⊢ dom (ℂ D cos) = dom (𝑥 ∈ ℂ ↦ -(sin‘𝑥))
15		dmmptg 6241	. . . . . . 7 ⊢ (∀𝑥 ∈ ℂ -(sin‘𝑥) ∈ ℂ → dom (𝑥 ∈ ℂ ↦ -(sin‘𝑥)) = ℂ)
16		sincl 16068	. . . . . . . 8 ⊢ (𝑥 ∈ ℂ → (sin‘𝑥) ∈ ℂ)
17	16	negcld 11557	. . . . . . 7 ⊢ (𝑥 ∈ ℂ → -(sin‘𝑥) ∈ ℂ)
18	15, 17	mprg 3067	. . . . . 6 ⊢ dom (𝑥 ∈ ℂ ↦ -(sin‘𝑥)) = ℂ
19	14, 18	eqtri 2760	. . . . 5 ⊢ dom (ℂ D cos) = ℂ
20	19	a1i 11	. . . 4 ⊢ (𝐴 ∈ ℂ → dom (ℂ D cos) = ℂ)
21		simpl 483	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝑥 ∈ ℂ) → 𝐴 ∈ ℂ)
22		0red 11216	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝑥 ∈ ℂ) → 0 ∈ ℝ)
23		id 22	. . . . . . . 8 ⊢ (𝐴 ∈ ℂ → 𝐴 ∈ ℂ)
24	11, 23	dvmptc 25474	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → (ℂ D (𝑥 ∈ ℂ ↦ 𝐴)) = (𝑥 ∈ ℂ ↦ 0))
25		simpr 485	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝑥 ∈ ℂ) → 𝑥 ∈ ℂ)
26		1red 11214	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝑥 ∈ ℂ) → 1 ∈ ℝ)
27	11	dvmptid 25473	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → (ℂ D (𝑥 ∈ ℂ ↦ 𝑥)) = (𝑥 ∈ ℂ ↦ 1))
28	11, 21, 22, 24, 25, 26, 27	dvmptmul 25477	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))) = (𝑥 ∈ ℂ ↦ ((0 · 𝑥) + (1 · 𝐴))))
29	28	dmeqd 5905	. . . . 5 ⊢ (𝐴 ∈ ℂ → dom (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))) = dom (𝑥 ∈ ℂ ↦ ((0 · 𝑥) + (1 · 𝐴))))
30		dmmptg 6241	. . . . . 6 ⊢ (∀𝑥 ∈ ℂ ((0 · 𝑥) + (1 · 𝐴)) ∈ V → dom (𝑥 ∈ ℂ ↦ ((0 · 𝑥) + (1 · 𝐴))) = ℂ)
31		ovex 7441	. . . . . . 7 ⊢ ((0 · 𝑥) + (1 · 𝐴)) ∈ V
32	31	a1i 11	. . . . . 6 ⊢ (𝑥 ∈ ℂ → ((0 · 𝑥) + (1 · 𝐴)) ∈ V)
33	30, 32	mprg 3067	. . . . 5 ⊢ dom (𝑥 ∈ ℂ ↦ ((0 · 𝑥) + (1 · 𝐴))) = ℂ
34	29, 33	eqtrdi 2788	. . . 4 ⊢ (𝐴 ∈ ℂ → dom (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))) = ℂ)
35	11, 11, 4, 12, 20, 34	dvcof 25464	. . 3 ⊢ (𝐴 ∈ ℂ → (ℂ D (cos ∘ (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))) = (((ℂ D cos) ∘ (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))) ∘_f · (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))))
36		dvcos 25499	. . . . . . 7 ⊢ (ℂ D cos) = (𝑦 ∈ ℂ ↦ -(sin‘𝑦))
37	36	a1i 11	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (ℂ D cos) = (𝑦 ∈ ℂ ↦ -(sin‘𝑦)))
38		fveq2 6891	. . . . . . 7 ⊢ (𝑦 = (𝐴 · 𝑥) → (sin‘𝑦) = (sin‘(𝐴 · 𝑥)))
39	38	negeqd 11453	. . . . . 6 ⊢ (𝑦 = (𝐴 · 𝑥) → -(sin‘𝑦) = -(sin‘(𝐴 · 𝑥)))
40	1, 2, 37, 39	fmptco 7126	. . . . 5 ⊢ (𝐴 ∈ ℂ → ((ℂ D cos) ∘ (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))) = (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))))
41	40	oveq1d 7423	. . . 4 ⊢ (𝐴 ∈ ℂ → (((ℂ D cos) ∘ (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))) ∘_f · (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))) = ((𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) ∘_f · (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))))
42		cnex 11190	. . . . . . 7 ⊢ ℂ ∈ V
43	42	mptex 7224	. . . . . 6 ⊢ (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) ∈ V
44		ovex 7441	. . . . . 6 ⊢ (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))) ∈ V
45		offval3 7968	. . . . . 6 ⊢ (((𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) ∈ V ∧ (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))) ∈ V) → ((𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) ∘_f · (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))) = (𝑦 ∈ (dom (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) ∩ dom (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))) ↦ (((𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥)))‘𝑦) · ((ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))‘𝑦))))
46	43, 44, 45	mp2an 690	. . . . 5 ⊢ ((𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) ∘_f · (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))) = (𝑦 ∈ (dom (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) ∩ dom (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))) ↦ (((𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥)))‘𝑦) · ((ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))‘𝑦)))
47	46	a1i 11	. . . 4 ⊢ (𝐴 ∈ ℂ → ((𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) ∘_f · (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))) = (𝑦 ∈ (dom (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) ∩ dom (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))) ↦ (((𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥)))‘𝑦) · ((ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))‘𝑦))))
48	1	sincld 16072	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝑥 ∈ ℂ) → (sin‘(𝐴 · 𝑥)) ∈ ℂ)
49	48	negcld 11557	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝑥 ∈ ℂ) → -(sin‘(𝐴 · 𝑥)) ∈ ℂ)
50	49	ralrimiva 3146	. . . . . . . 8 ⊢ (𝐴 ∈ ℂ → ∀𝑥 ∈ ℂ -(sin‘(𝐴 · 𝑥)) ∈ ℂ)
51		dmmptg 6241	. . . . . . . 8 ⊢ (∀𝑥 ∈ ℂ -(sin‘(𝐴 · 𝑥)) ∈ ℂ → dom (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) = ℂ)
52	50, 51	syl 17	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → dom (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) = ℂ)
53	52, 34	ineq12d 4213	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (dom (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) ∩ dom (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))) = (ℂ ∩ ℂ))
54		inidm 4218	. . . . . 6 ⊢ (ℂ ∩ ℂ) = ℂ
55	53, 54	eqtrdi 2788	. . . . 5 ⊢ (𝐴 ∈ ℂ → (dom (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) ∩ dom (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))) = ℂ)
56		simpr 485	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ (dom (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) ∩ dom (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))))) → 𝑦 ∈ (dom (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) ∩ dom (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))))
57	55	adantr 481	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ (dom (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) ∩ dom (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))))) → (dom (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) ∩ dom (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))) = ℂ)
58	56, 57	eleqtrd 2835	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ (dom (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) ∩ dom (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))))) → 𝑦 ∈ ℂ)
59		eqidd 2733	. . . . . . . . . 10 ⊢ (𝑦 ∈ ℂ → (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) = (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))))
60		oveq2 7416	. . . . . . . . . . . . 13 ⊢ (𝑥 = 𝑦 → (𝐴 · 𝑥) = (𝐴 · 𝑦))
61	60	fveq2d 6895	. . . . . . . . . . . 12 ⊢ (𝑥 = 𝑦 → (sin‘(𝐴 · 𝑥)) = (sin‘(𝐴 · 𝑦)))
62	61	negeqd 11453	. . . . . . . . . . 11 ⊢ (𝑥 = 𝑦 → -(sin‘(𝐴 · 𝑥)) = -(sin‘(𝐴 · 𝑦)))
63	62	adantl 482	. . . . . . . . . 10 ⊢ ((𝑦 ∈ ℂ ∧ 𝑥 = 𝑦) → -(sin‘(𝐴 · 𝑥)) = -(sin‘(𝐴 · 𝑦)))
64		id 22	. . . . . . . . . 10 ⊢ (𝑦 ∈ ℂ → 𝑦 ∈ ℂ)
65		negex 11457	. . . . . . . . . . 11 ⊢ -(sin‘(𝐴 · 𝑦)) ∈ V
66	65	a1i 11	. . . . . . . . . 10 ⊢ (𝑦 ∈ ℂ → -(sin‘(𝐴 · 𝑦)) ∈ V)
67	59, 63, 64, 66	fvmptd 7005	. . . . . . . . 9 ⊢ (𝑦 ∈ ℂ → ((𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥)))‘𝑦) = -(sin‘(𝐴 · 𝑦)))
68	67	adantl 482	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → ((𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥)))‘𝑦) = -(sin‘(𝐴 · 𝑦)))
69	28	adantr 481	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))) = (𝑥 ∈ ℂ ↦ ((0 · 𝑥) + (1 · 𝐴))))
70		oveq2 7416	. . . . . . . . . . 11 ⊢ (𝑥 = 𝑦 → (0 · 𝑥) = (0 · 𝑦))
71	70	oveq1d 7423	. . . . . . . . . 10 ⊢ (𝑥 = 𝑦 → ((0 · 𝑥) + (1 · 𝐴)) = ((0 · 𝑦) + (1 · 𝐴)))
72		mul02 11391	. . . . . . . . . . . 12 ⊢ (𝑦 ∈ ℂ → (0 · 𝑦) = 0)
73		mullid 11212	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴)
74	72, 73	oveqan12rd 7428	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → ((0 · 𝑦) + (1 · 𝐴)) = (0 + 𝐴))
75		addlid 11396	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ ℂ → (0 + 𝐴) = 𝐴)
76	75	adantr 481	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (0 + 𝐴) = 𝐴)
77	74, 76	eqtrd 2772	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → ((0 · 𝑦) + (1 · 𝐴)) = 𝐴)
78	71, 77	sylan9eqr 2794	. . . . . . . . 9 ⊢ (((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) ∧ 𝑥 = 𝑦) → ((0 · 𝑥) + (1 · 𝐴)) = 𝐴)
79		simpr 485	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → 𝑦 ∈ ℂ)
80		simpl 483	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → 𝐴 ∈ ℂ)
81	69, 78, 79, 80	fvmptd 7005	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → ((ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))‘𝑦) = 𝐴)
82	68, 81	oveq12d 7426	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (((𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥)))‘𝑦) · ((ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))‘𝑦)) = (-(sin‘(𝐴 · 𝑦)) · 𝐴))
83		mulcl 11193	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (𝐴 · 𝑦) ∈ ℂ)
84	83	sincld 16072	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (sin‘(𝐴 · 𝑦)) ∈ ℂ)
85	84	negcld 11557	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → -(sin‘(𝐴 · 𝑦)) ∈ ℂ)
86	85, 80	mulcomd 11234	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (-(sin‘(𝐴 · 𝑦)) · 𝐴) = (𝐴 · -(sin‘(𝐴 · 𝑦))))
87	82, 86	eqtrd 2772	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (((𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥)))‘𝑦) · ((ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))‘𝑦)) = (𝐴 · -(sin‘(𝐴 · 𝑦))))
88	58, 87	syldan 591	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ (dom (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) ∩ dom (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))))) → (((𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥)))‘𝑦) · ((ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))‘𝑦)) = (𝐴 · -(sin‘(𝐴 · 𝑦))))
89	55, 88	mpteq12dva 5237	. . . 4 ⊢ (𝐴 ∈ ℂ → (𝑦 ∈ (dom (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) ∩ dom (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))) ↦ (((𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥)))‘𝑦) · ((ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))‘𝑦))) = (𝑦 ∈ ℂ ↦ (𝐴 · -(sin‘(𝐴 · 𝑦)))))
90	41, 47, 89	3eqtrd 2776	. . 3 ⊢ (𝐴 ∈ ℂ → (((ℂ D cos) ∘ (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))) ∘_f · (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))) = (𝑦 ∈ ℂ ↦ (𝐴 · -(sin‘(𝐴 · 𝑦)))))
91	9, 35, 90	3eqtrd 2776	. 2 ⊢ (𝐴 ∈ ℂ → (ℂ D (𝑥 ∈ ℂ ↦ (cos‘(𝐴 · 𝑥)))) = (𝑦 ∈ ℂ ↦ (𝐴 · -(sin‘(𝐴 · 𝑦)))))
92		oveq2 7416	. . . . . 6 ⊢ (𝑦 = 𝑥 → (𝐴 · 𝑦) = (𝐴 · 𝑥))
93	92	fveq2d 6895	. . . . 5 ⊢ (𝑦 = 𝑥 → (sin‘(𝐴 · 𝑦)) = (sin‘(𝐴 · 𝑥)))
94	93	negeqd 11453	. . . 4 ⊢ (𝑦 = 𝑥 → -(sin‘(𝐴 · 𝑦)) = -(sin‘(𝐴 · 𝑥)))
95	94	oveq2d 7424	. . 3 ⊢ (𝑦 = 𝑥 → (𝐴 · -(sin‘(𝐴 · 𝑦))) = (𝐴 · -(sin‘(𝐴 · 𝑥))))
96	95	cbvmptv 5261	. 2 ⊢ (𝑦 ∈ ℂ ↦ (𝐴 · -(sin‘(𝐴 · 𝑦)))) = (𝑥 ∈ ℂ ↦ (𝐴 · -(sin‘(𝐴 · 𝑥))))
97	91, 96	eqtrdi 2788	1 ⊢ (𝐴 ∈ ℂ → (ℂ D (𝑥 ∈ ℂ ↦ (cos‘(𝐴 · 𝑥)))) = (𝑥 ∈ ℂ ↦ (𝐴 · -(sin‘(𝐴 · 𝑥)))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 396 = wceq 1541 ∈ wcel 2106 ∀wral 3061 Vcvv 3474 ∩ cin 3947 {cpr 4630 ↦ cmpt 5231 dom cdm 5676 ∘ ccom 5680 ⟶wf 6539 ‘cfv 6543 (class class class)co 7408 ∘_f cof 7667 ℂcc 11107 ℝcr 11108 0cc0 11109 1c1 11110 + caddc 11112 · cmul 11114 -cneg 11444 sincsin 16006 cosccos 16007 D cdv 25379

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7724 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 ax-mulf 11189

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3376 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-tp 4633 df-op 4635 df-uni 4909 df-int 4951 df-iun 4999 df-iin 5000 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-se 5632 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-isom 6552 df-riota 7364 df-ov 7411 df-oprab 7412 df-mpo 7413 df-of 7669 df-om 7855 df-1st 7974 df-2nd 7975 df-supp 8146 df-frecs 8265 df-wrecs 8296 df-recs 8370 df-rdg 8409 df-1o 8465 df-2o 8466 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 11249 df-mnf 11250 df-xr 11251 df-ltxr 11252 df-le 11253 df-sub 11445 df-neg 11446 df-div 11871 df-nn 12212 df-2 12274 df-3 12275 df-4 12276 df-5 12277 df-6 12278 df-7 12279 df-8 12280 df-9 12281 df-n0 12472 df-z 12558 df-dec 12677 df-uz 12822 df-q 12932 df-rp 12974 df-xneg 13091 df-xadd 13092 df-xmul 13093 df-ico 13329 df-icc 13330 df-fz 13484 df-fzo 13627 df-fl 13756 df-seq 13966 df-exp 14027 df-fac 14233 df-bc 14262 df-hash 14290 df-shft 15013 df-cj 15045 df-re 15046 df-im 15047 df-sqrt 15181 df-abs 15182 df-limsup 15414 df-clim 15431 df-rlim 15432 df-sum 15632 df-ef 16010 df-sin 16012 df-cos 16013 df-struct 17079 df-sets 17096 df-slot 17114 df-ndx 17126 df-base 17144 df-ress 17173 df-plusg 17209 df-mulr 17210 df-starv 17211 df-sca 17212 df-vsca 17213 df-ip 17214 df-tset 17215 df-ple 17216 df-ds 17218 df-unif 17219 df-hom 17220 df-cco 17221 df-rest 17367 df-topn 17368 df-0g 17386 df-gsum 17387 df-topgen 17388 df-pt 17389 df-prds 17392 df-xrs 17447 df-qtop 17452 df-imas 17453 df-xps 17455 df-mre 17529 df-mrc 17530 df-acs 17532 df-mgm 18560 df-sgrp 18609 df-mnd 18625 df-submnd 18671 df-mulg 18950 df-cntz 19180 df-cmn 19649 df-psmet 20935 df-xmet 20936 df-met 20937 df-bl 20938 df-mopn 20939 df-fbas 20940 df-fg 20941 df-cnfld 20944 df-top 22395 df-topon 22412 df-topsp 22434 df-bases 22448 df-cld 22522 df-ntr 22523 df-cls 22524 df-nei 22601 df-lp 22639 df-perf 22640 df-cn 22730 df-cnp 22731 df-haus 22818 df-tx 23065 df-hmeo 23258 df-fil 23349 df-fm 23441 df-flim 23442 df-flf 23443 df-xms 23825 df-ms 23826 df-tms 23827 df-cncf 24393 df-limc 25382 df-dv 25383

This theorem is referenced by: itgsincmulx 44680

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