dvcosax - Mathbox for Glauco Siliprandi

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Theorem dvcosax 45195

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 2727	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)) = (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))
3		cosf 16073	. . . . . . . 8 ⊢ cos:ℂ⟶ℂ
4	3	a1i 11	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → cos:ℂ⟶ℂ)
5	4	feqmptd 6953	. . . . . 6 ⊢ (𝐴 ∈ ℂ → cos = (𝑦 ∈ ℂ ↦ (cos‘𝑦)))
6		fveq2 6884	. . . . . 6 ⊢ (𝑦 = (𝐴 · 𝑥) → (cos‘𝑦) = (cos‘(𝐴 · 𝑥)))
7	1, 2, 5, 6	fmptco 7122	. . . . 5 ⊢ (𝐴 ∈ ℂ → (cos ∘ (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))) = (𝑥 ∈ ℂ ↦ (cos‘(𝐴 · 𝑥))))
8	7	eqcomd 2732	. . . 4 ⊢ (𝐴 ∈ ℂ → (𝑥 ∈ ℂ ↦ (cos‘(𝐴 · 𝑥))) = (cos ∘ (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))))
9	8	oveq2d 7420	. . 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 7109	. . . 4 ⊢ (𝐴 ∈ ℂ → (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)):ℂ⟶ℂ)
13		dvcos 25866	. . . . . . 7 ⊢ (ℂ D cos) = (𝑥 ∈ ℂ ↦ -(sin‘𝑥))
14	13	dmeqi 5897	. . . . . 6 ⊢ dom (ℂ D cos) = dom (𝑥 ∈ ℂ ↦ -(sin‘𝑥))
15		dmmptg 6234	. . . . . . 7 ⊢ (∀𝑥 ∈ ℂ -(sin‘𝑥) ∈ ℂ → dom (𝑥 ∈ ℂ ↦ -(sin‘𝑥)) = ℂ)
16		sincl 16074	. . . . . . . 8 ⊢ (𝑥 ∈ ℂ → (sin‘𝑥) ∈ ℂ)
17	16	negcld 11559	. . . . . . 7 ⊢ (𝑥 ∈ ℂ → -(sin‘𝑥) ∈ ℂ)
18	15, 17	mprg 3061	. . . . . 6 ⊢ dom (𝑥 ∈ ℂ ↦ -(sin‘𝑥)) = ℂ
19	14, 18	eqtri 2754	. . . . 5 ⊢ dom (ℂ D cos) = ℂ
20	19	a1i 11	. . . 4 ⊢ (𝐴 ∈ ℂ → dom (ℂ D cos) = ℂ)
21		simpl 482	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝑥 ∈ ℂ) → 𝐴 ∈ ℂ)
22		0red 11218	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝑥 ∈ ℂ) → 0 ∈ ℝ)
23		id 22	. . . . . . . 8 ⊢ (𝐴 ∈ ℂ → 𝐴 ∈ ℂ)
24	11, 23	dvmptc 25841	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → (ℂ D (𝑥 ∈ ℂ ↦ 𝐴)) = (𝑥 ∈ ℂ ↦ 0))
25		simpr 484	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝑥 ∈ ℂ) → 𝑥 ∈ ℂ)
26		1red 11216	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝑥 ∈ ℂ) → 1 ∈ ℝ)
27	11	dvmptid 25840	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → (ℂ D (𝑥 ∈ ℂ ↦ 𝑥)) = (𝑥 ∈ ℂ ↦ 1))
28	11, 21, 22, 24, 25, 26, 27	dvmptmul 25844	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))) = (𝑥 ∈ ℂ ↦ ((0 · 𝑥) + (1 · 𝐴))))
29	28	dmeqd 5898	. . . . 5 ⊢ (𝐴 ∈ ℂ → dom (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))) = dom (𝑥 ∈ ℂ ↦ ((0 · 𝑥) + (1 · 𝐴))))
30		dmmptg 6234	. . . . . 6 ⊢ (∀𝑥 ∈ ℂ ((0 · 𝑥) + (1 · 𝐴)) ∈ V → dom (𝑥 ∈ ℂ ↦ ((0 · 𝑥) + (1 · 𝐴))) = ℂ)
31		ovex 7437	. . . . . . 7 ⊢ ((0 · 𝑥) + (1 · 𝐴)) ∈ V
32	31	a1i 11	. . . . . 6 ⊢ (𝑥 ∈ ℂ → ((0 · 𝑥) + (1 · 𝐴)) ∈ V)
33	30, 32	mprg 3061	. . . . 5 ⊢ dom (𝑥 ∈ ℂ ↦ ((0 · 𝑥) + (1 · 𝐴))) = ℂ
34	29, 33	eqtrdi 2782	. . . 4 ⊢ (𝐴 ∈ ℂ → dom (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))) = ℂ)
35	11, 11, 4, 12, 20, 34	dvcof 25831	. . 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 25866	. . . . . . 7 ⊢ (ℂ D cos) = (𝑦 ∈ ℂ ↦ -(sin‘𝑦))
37	36	a1i 11	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (ℂ D cos) = (𝑦 ∈ ℂ ↦ -(sin‘𝑦)))
38		fveq2 6884	. . . . . . 7 ⊢ (𝑦 = (𝐴 · 𝑥) → (sin‘𝑦) = (sin‘(𝐴 · 𝑥)))
39	38	negeqd 11455	. . . . . 6 ⊢ (𝑦 = (𝐴 · 𝑥) → -(sin‘𝑦) = -(sin‘(𝐴 · 𝑥)))
40	1, 2, 37, 39	fmptco 7122	. . . . 5 ⊢ (𝐴 ∈ ℂ → ((ℂ D cos) ∘ (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))) = (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))))
41	40	oveq1d 7419	. . . 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 7219	. . . . . 6 ⊢ (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) ∈ V
44		ovex 7437	. . . . . 6 ⊢ (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))) ∈ V
45		offval3 7965	. . . . . 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 689	. . . . 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 16078	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝑥 ∈ ℂ) → (sin‘(𝐴 · 𝑥)) ∈ ℂ)
49	48	negcld 11559	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝑥 ∈ ℂ) → -(sin‘(𝐴 · 𝑥)) ∈ ℂ)
50	49	ralrimiva 3140	. . . . . . . 8 ⊢ (𝐴 ∈ ℂ → ∀𝑥 ∈ ℂ -(sin‘(𝐴 · 𝑥)) ∈ ℂ)
51		dmmptg 6234	. . . . . . . 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 4208	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (dom (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) ∩ dom (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))) = (ℂ ∩ ℂ))
54		inidm 4213	. . . . . 6 ⊢ (ℂ ∩ ℂ) = ℂ
55	53, 54	eqtrdi 2782	. . . . 5 ⊢ (𝐴 ∈ ℂ → (dom (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) ∩ dom (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))) = ℂ)
56		simpr 484	. . . . . . 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 480	. . . . . . 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 2829	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ (dom (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) ∩ dom (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))))) → 𝑦 ∈ ℂ)
59		eqidd 2727	. . . . . . . . . 10 ⊢ (𝑦 ∈ ℂ → (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))) = (𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥))))
60		oveq2 7412	. . . . . . . . . . . . 13 ⊢ (𝑥 = 𝑦 → (𝐴 · 𝑥) = (𝐴 · 𝑦))
61	60	fveq2d 6888	. . . . . . . . . . . 12 ⊢ (𝑥 = 𝑦 → (sin‘(𝐴 · 𝑥)) = (sin‘(𝐴 · 𝑦)))
62	61	negeqd 11455	. . . . . . . . . . 11 ⊢ (𝑥 = 𝑦 → -(sin‘(𝐴 · 𝑥)) = -(sin‘(𝐴 · 𝑦)))
63	62	adantl 481	. . . . . . . . . 10 ⊢ ((𝑦 ∈ ℂ ∧ 𝑥 = 𝑦) → -(sin‘(𝐴 · 𝑥)) = -(sin‘(𝐴 · 𝑦)))
64		id 22	. . . . . . . . . 10 ⊢ (𝑦 ∈ ℂ → 𝑦 ∈ ℂ)
65		negex 11459	. . . . . . . . . . 11 ⊢ -(sin‘(𝐴 · 𝑦)) ∈ V
66	65	a1i 11	. . . . . . . . . 10 ⊢ (𝑦 ∈ ℂ → -(sin‘(𝐴 · 𝑦)) ∈ V)
67	59, 63, 64, 66	fvmptd 6998	. . . . . . . . 9 ⊢ (𝑦 ∈ ℂ → ((𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥)))‘𝑦) = -(sin‘(𝐴 · 𝑦)))
68	67	adantl 481	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → ((𝑥 ∈ ℂ ↦ -(sin‘(𝐴 · 𝑥)))‘𝑦) = -(sin‘(𝐴 · 𝑦)))
69	28	adantr 480	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥))) = (𝑥 ∈ ℂ ↦ ((0 · 𝑥) + (1 · 𝐴))))
70		oveq2 7412	. . . . . . . . . . 11 ⊢ (𝑥 = 𝑦 → (0 · 𝑥) = (0 · 𝑦))
71	70	oveq1d 7419	. . . . . . . . . 10 ⊢ (𝑥 = 𝑦 → ((0 · 𝑥) + (1 · 𝐴)) = ((0 · 𝑦) + (1 · 𝐴)))
72		mul02 11393	. . . . . . . . . . . 12 ⊢ (𝑦 ∈ ℂ → (0 · 𝑦) = 0)
73		mullid 11214	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴)
74	72, 73	oveqan12rd 7424	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → ((0 · 𝑦) + (1 · 𝐴)) = (0 + 𝐴))
75		addlid 11398	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ ℂ → (0 + 𝐴) = 𝐴)
76	75	adantr 480	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (0 + 𝐴) = 𝐴)
77	74, 76	eqtrd 2766	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → ((0 · 𝑦) + (1 · 𝐴)) = 𝐴)
78	71, 77	sylan9eqr 2788	. . . . . . . . 9 ⊢ (((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) ∧ 𝑥 = 𝑦) → ((0 · 𝑥) + (1 · 𝐴)) = 𝐴)
79		simpr 484	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → 𝑦 ∈ ℂ)
80		simpl 482	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → 𝐴 ∈ ℂ)
81	69, 78, 79, 80	fvmptd 6998	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → ((ℂ D (𝑥 ∈ ℂ ↦ (𝐴 · 𝑥)))‘𝑦) = 𝐴)
82	68, 81	oveq12d 7422	. . . . . . 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 16078	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (sin‘(𝐴 · 𝑦)) ∈ ℂ)
85	84	negcld 11559	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → -(sin‘(𝐴 · 𝑦)) ∈ ℂ)
86	85, 80	mulcomd 11236	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (-(sin‘(𝐴 · 𝑦)) · 𝐴) = (𝐴 · -(sin‘(𝐴 · 𝑦))))
87	82, 86	eqtrd 2766	. . . . . 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 590	. . . . 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 5230	. . . 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 2770	. . 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 2770	. 2 ⊢ (𝐴 ∈ ℂ → (ℂ D (𝑥 ∈ ℂ ↦ (cos‘(𝐴 · 𝑥)))) = (𝑦 ∈ ℂ ↦ (𝐴 · -(sin‘(𝐴 · 𝑦)))))
92		oveq2 7412	. . . . . 6 ⊢ (𝑦 = 𝑥 → (𝐴 · 𝑦) = (𝐴 · 𝑥))
93	92	fveq2d 6888	. . . . 5 ⊢ (𝑦 = 𝑥 → (sin‘(𝐴 · 𝑦)) = (sin‘(𝐴 · 𝑥)))
94	93	negeqd 11455	. . . 4 ⊢ (𝑦 = 𝑥 → -(sin‘(𝐴 · 𝑦)) = -(sin‘(𝐴 · 𝑥)))
95	94	oveq2d 7420	. . 3 ⊢ (𝑦 = 𝑥 → (𝐴 · -(sin‘(𝐴 · 𝑦))) = (𝐴 · -(sin‘(𝐴 · 𝑥))))
96	95	cbvmptv 5254	. 2 ⊢ (𝑦 ∈ ℂ ↦ (𝐴 · -(sin‘(𝐴 · 𝑦)))) = (𝑥 ∈ ℂ ↦ (𝐴 · -(sin‘(𝐴 · 𝑥))))
97	91, 96	eqtrdi 2782	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 395 = wceq 1533 ∈ wcel 2098 ∀wral 3055 Vcvv 3468 ∩ cin 3942 {cpr 4625 ↦ cmpt 5224 dom cdm 5669 ∘ ccom 5673 ⟶wf 6532 ‘cfv 6536 (class class class)co 7404 ∘_f cof 7664 ℂcc 11107 ℝcr 11108 0cc0 11109 1c1 11110 + caddc 11112 · cmul 11114 -cneg 11446 sincsin 16011 cosccos 16012 D cdv 25743

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2697 ax-rep 5278 ax-sep 5292 ax-nul 5299 ax-pow 5356 ax-pr 5420 ax-un 7721 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

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-nel 3041 df-ral 3056 df-rex 3065 df-rmo 3370 df-reu 3371 df-rab 3427 df-v 3470 df-sbc 3773 df-csb 3889 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-pss 3962 df-nul 4318 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-tp 4628 df-op 4630 df-uni 4903 df-int 4944 df-iun 4992 df-iin 4993 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-se 5625 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6293 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6488 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-isom 6545 df-riota 7360 df-ov 7407 df-oprab 7408 df-mpo 7409 df-of 7666 df-om 7852 df-1st 7971 df-2nd 7972 df-supp 8144 df-frecs 8264 df-wrecs 8295 df-recs 8369 df-rdg 8408 df-1o 8464 df-2o 8465 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 11251 df-mnf 11252 df-xr 11253 df-ltxr 11254 df-le 11255 df-sub 11447 df-neg 11448 df-div 11873 df-nn 12214 df-2 12276 df-3 12277 df-4 12278 df-5 12279 df-6 12280 df-7 12281 df-8 12282 df-9 12283 df-n0 12474 df-z 12560 df-dec 12679 df-uz 12824 df-q 12934 df-rp 12978 df-xneg 13095 df-xadd 13096 df-xmul 13097 df-ico 13333 df-icc 13334 df-fz 13488 df-fzo 13631 df-fl 13760 df-seq 13970 df-exp 14031 df-fac 14237 df-bc 14266 df-hash 14294 df-shft 15018 df-cj 15050 df-re 15051 df-im 15052 df-sqrt 15186 df-abs 15187 df-limsup 15419 df-clim 15436 df-rlim 15437 df-sum 15637 df-ef 16015 df-sin 16017 df-cos 16018 df-struct 17087 df-sets 17104 df-slot 17122 df-ndx 17134 df-base 17152 df-ress 17181 df-plusg 17217 df-mulr 17218 df-starv 17219 df-sca 17220 df-vsca 17221 df-ip 17222 df-tset 17223 df-ple 17224 df-ds 17226 df-unif 17227 df-hom 17228 df-cco 17229 df-rest 17375 df-topn 17376 df-0g 17394 df-gsum 17395 df-topgen 17396 df-pt 17397 df-prds 17400 df-xrs 17455 df-qtop 17460 df-imas 17461 df-xps 17463 df-mre 17537 df-mrc 17538 df-acs 17540 df-mgm 18571 df-sgrp 18650 df-mnd 18666 df-submnd 18712 df-mulg 18994 df-cntz 19231 df-cmn 19700 df-psmet 21228 df-xmet 21229 df-met 21230 df-bl 21231 df-mopn 21232 df-fbas 21233 df-fg 21234 df-cnfld 21237 df-top 22747 df-topon 22764 df-topsp 22786 df-bases 22800 df-cld 22874 df-ntr 22875 df-cls 22876 df-nei 22953 df-lp 22991 df-perf 22992 df-cn 23082 df-cnp 23083 df-haus 23170 df-tx 23417 df-hmeo 23610 df-fil 23701 df-fm 23793 df-flim 23794 df-flf 23795 df-xms 24177 df-ms 24178 df-tms 24179 df-cncf 24749 df-limc 25746 df-dv 25747

This theorem is referenced by: itgsincmulx 45243

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