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Theorem dvsincos 25497

Description: Derivative of the sine and cosine functions. (Contributed by Mario Carneiro, 21-May-2016.)

**Assertion**
Ref	Expression
dvsincos	⊢ ((ℂ D sin) = cos ∧ (ℂ D cos) = (𝑥 ∈ ℂ ↦ -(sin‘𝑥)))

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

Step	Hyp	Ref	Expression
1		cnelprrecn 11202	. . . . . 6 ⊢ ℂ ∈ {ℝ, ℂ}
2	1	a1i 11	. . . . 5 ⊢ (⊤ → ℂ ∈ {ℝ, ℂ})
3		ax-icn 11168	. . . . . . . . . 10 ⊢ i ∈ ℂ
4	3	a1i 11	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → i ∈ ℂ)
5		simpr 485	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → 𝑥 ∈ ℂ)
6	4, 5	mulcld 11233	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (i · 𝑥) ∈ ℂ)
7		efcl 16025	. . . . . . . 8 ⊢ ((i · 𝑥) ∈ ℂ → (exp‘(i · 𝑥)) ∈ ℂ)
8	6, 7	syl 17	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (exp‘(i · 𝑥)) ∈ ℂ)
9		ine0 11648	. . . . . . . 8 ⊢ i ≠ 0
10	9	a1i 11	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → i ≠ 0)
11	8, 4, 10	divcld 11989	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → ((exp‘(i · 𝑥)) / i) ∈ ℂ)
12		negicn 11460	. . . . . . . . . 10 ⊢ -i ∈ ℂ
13		mulcl 11193	. . . . . . . . . 10 ⊢ ((-i ∈ ℂ ∧ 𝑥 ∈ ℂ) → (-i · 𝑥) ∈ ℂ)
14	12, 5, 13	sylancr 587	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (-i · 𝑥) ∈ ℂ)
15		efcl 16025	. . . . . . . . 9 ⊢ ((-i · 𝑥) ∈ ℂ → (exp‘(-i · 𝑥)) ∈ ℂ)
16	14, 15	syl 17	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (exp‘(-i · 𝑥)) ∈ ℂ)
17	16, 4, 10	divcld 11989	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → ((exp‘(-i · 𝑥)) / i) ∈ ℂ)
18	17	negcld 11557	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → -((exp‘(-i · 𝑥)) / i) ∈ ℂ)
19	11, 18	addcld 11232	. . . . 5 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) / i) + -((exp‘(-i · 𝑥)) / i)) ∈ ℂ)
20	8, 16	addcld 11232	. . . . 5 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → ((exp‘(i · 𝑥)) + (exp‘(-i · 𝑥))) ∈ ℂ)
21	8, 4	mulcld 11233	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → ((exp‘(i · 𝑥)) · i) ∈ ℂ)
22		efcl 16025	. . . . . . . . . 10 ⊢ (𝑦 ∈ ℂ → (exp‘𝑦) ∈ ℂ)
23	22	adantl 482	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑦 ∈ ℂ) → (exp‘𝑦) ∈ ℂ)
24		1cnd 11208	. . . . . . . . . . 11 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → 1 ∈ ℂ)
25	2	dvmptid 25473	. . . . . . . . . . 11 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ 𝑥)) = (𝑥 ∈ ℂ ↦ 1))
26	3	a1i 11	. . . . . . . . . . 11 ⊢ (⊤ → i ∈ ℂ)
27	2, 5, 24, 25, 26	dvmptcmul 25480	. . . . . . . . . 10 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ (i · 𝑥))) = (𝑥 ∈ ℂ ↦ (i · 1)))
28	3	mulridi 11217	. . . . . . . . . . 11 ⊢ (i · 1) = i
29	28	mpteq2i 5253	. . . . . . . . . 10 ⊢ (𝑥 ∈ ℂ ↦ (i · 1)) = (𝑥 ∈ ℂ ↦ i)
30	27, 29	eqtrdi 2788	. . . . . . . . 9 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ (i · 𝑥))) = (𝑥 ∈ ℂ ↦ i))
31		eff 16024	. . . . . . . . . . . . 13 ⊢ exp:ℂ⟶ℂ
32	31	a1i 11	. . . . . . . . . . . 12 ⊢ (⊤ → exp:ℂ⟶ℂ)
33	32	feqmptd 6960	. . . . . . . . . . 11 ⊢ (⊤ → exp = (𝑦 ∈ ℂ ↦ (exp‘𝑦)))
34	33	oveq2d 7424	. . . . . . . . . 10 ⊢ (⊤ → (ℂ D exp) = (ℂ D (𝑦 ∈ ℂ ↦ (exp‘𝑦))))
35		dvef 25496	. . . . . . . . . . 11 ⊢ (ℂ D exp) = exp
36	35, 33	eqtrid 2784	. . . . . . . . . 10 ⊢ (⊤ → (ℂ D exp) = (𝑦 ∈ ℂ ↦ (exp‘𝑦)))
37	34, 36	eqtr3d 2774	. . . . . . . . 9 ⊢ (⊤ → (ℂ D (𝑦 ∈ ℂ ↦ (exp‘𝑦))) = (𝑦 ∈ ℂ ↦ (exp‘𝑦)))
38		fveq2 6891	. . . . . . . . 9 ⊢ (𝑦 = (i · 𝑥) → (exp‘𝑦) = (exp‘(i · 𝑥)))
39	2, 2, 6, 4, 23, 23, 30, 37, 38, 38	dvmptco 25488	. . . . . . . 8 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ (exp‘(i · 𝑥)))) = (𝑥 ∈ ℂ ↦ ((exp‘(i · 𝑥)) · i)))
40	9	a1i 11	. . . . . . . 8 ⊢ (⊤ → i ≠ 0)
41	2, 8, 21, 39, 26, 40	dvmptdivc 25481	. . . . . . 7 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ ((exp‘(i · 𝑥)) / i))) = (𝑥 ∈ ℂ ↦ (((exp‘(i · 𝑥)) · i) / i)))
42	8, 4, 10	divcan4d 11995	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) · i) / i) = (exp‘(i · 𝑥)))
43	42	mpteq2dva 5248	. . . . . . 7 ⊢ (⊤ → (𝑥 ∈ ℂ ↦ (((exp‘(i · 𝑥)) · i) / i)) = (𝑥 ∈ ℂ ↦ (exp‘(i · 𝑥))))
44	41, 43	eqtrd 2772	. . . . . 6 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ ((exp‘(i · 𝑥)) / i))) = (𝑥 ∈ ℂ ↦ (exp‘(i · 𝑥))))
45		mulcl 11193	. . . . . . . . . 10 ⊢ (((exp‘(-i · 𝑥)) ∈ ℂ ∧ -i ∈ ℂ) → ((exp‘(-i · 𝑥)) · -i) ∈ ℂ)
46	16, 12, 45	sylancl 586	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → ((exp‘(-i · 𝑥)) · -i) ∈ ℂ)
47	46, 4, 10	divcld 11989	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(-i · 𝑥)) · -i) / i) ∈ ℂ)
48	12	a1i 11	. . . . . . . . . 10 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → -i ∈ ℂ)
49	12	a1i 11	. . . . . . . . . . . 12 ⊢ (⊤ → -i ∈ ℂ)
50	2, 5, 24, 25, 49	dvmptcmul 25480	. . . . . . . . . . 11 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ (-i · 𝑥))) = (𝑥 ∈ ℂ ↦ (-i · 1)))
51	12	mulridi 11217	. . . . . . . . . . . 12 ⊢ (-i · 1) = -i
52	51	mpteq2i 5253	. . . . . . . . . . 11 ⊢ (𝑥 ∈ ℂ ↦ (-i · 1)) = (𝑥 ∈ ℂ ↦ -i)
53	50, 52	eqtrdi 2788	. . . . . . . . . 10 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ (-i · 𝑥))) = (𝑥 ∈ ℂ ↦ -i))
54		fveq2 6891	. . . . . . . . . 10 ⊢ (𝑦 = (-i · 𝑥) → (exp‘𝑦) = (exp‘(-i · 𝑥)))
55	2, 2, 14, 48, 23, 23, 53, 37, 54, 54	dvmptco 25488	. . . . . . . . 9 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ (exp‘(-i · 𝑥)))) = (𝑥 ∈ ℂ ↦ ((exp‘(-i · 𝑥)) · -i)))
56	2, 16, 46, 55, 26, 40	dvmptdivc 25481	. . . . . . . 8 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ ((exp‘(-i · 𝑥)) / i))) = (𝑥 ∈ ℂ ↦ (((exp‘(-i · 𝑥)) · -i) / i)))
57	2, 17, 47, 56	dvmptneg 25482	. . . . . . 7 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ -((exp‘(-i · 𝑥)) / i))) = (𝑥 ∈ ℂ ↦ -(((exp‘(-i · 𝑥)) · -i) / i)))
58	46, 4, 10	divneg2d 12003	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → -(((exp‘(-i · 𝑥)) · -i) / i) = (((exp‘(-i · 𝑥)) · -i) / -i))
59	3, 9	negne0i 11534	. . . . . . . . . . 11 ⊢ -i ≠ 0
60	59	a1i 11	. . . . . . . . . 10 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → -i ≠ 0)
61	16, 48, 60	divcan4d 11995	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(-i · 𝑥)) · -i) / -i) = (exp‘(-i · 𝑥)))
62	58, 61	eqtrd 2772	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → -(((exp‘(-i · 𝑥)) · -i) / i) = (exp‘(-i · 𝑥)))
63	62	mpteq2dva 5248	. . . . . . 7 ⊢ (⊤ → (𝑥 ∈ ℂ ↦ -(((exp‘(-i · 𝑥)) · -i) / i)) = (𝑥 ∈ ℂ ↦ (exp‘(-i · 𝑥))))
64	57, 63	eqtrd 2772	. . . . . 6 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ -((exp‘(-i · 𝑥)) / i))) = (𝑥 ∈ ℂ ↦ (exp‘(-i · 𝑥))))
65	2, 11, 8, 44, 18, 16, 64	dvmptadd 25476	. . . . 5 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ (((exp‘(i · 𝑥)) / i) + -((exp‘(-i · 𝑥)) / i)))) = (𝑥 ∈ ℂ ↦ ((exp‘(i · 𝑥)) + (exp‘(-i · 𝑥)))))
66		2cnd 12289	. . . . 5 ⊢ (⊤ → 2 ∈ ℂ)
67		2ne0 12315	. . . . . 6 ⊢ 2 ≠ 0
68	67	a1i 11	. . . . 5 ⊢ (⊤ → 2 ≠ 0)
69	2, 19, 20, 65, 66, 68	dvmptdivc 25481	. . . 4 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ ((((exp‘(i · 𝑥)) / i) + -((exp‘(-i · 𝑥)) / i)) / 2))) = (𝑥 ∈ ℂ ↦ (((exp‘(i · 𝑥)) + (exp‘(-i · 𝑥))) / 2)))
70		df-sin 16012	. . . . . 6 ⊢ sin = (𝑥 ∈ ℂ ↦ (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / (2 · i)))
71	8, 16	subcld 11570	. . . . . . . . . 10 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → ((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) ∈ ℂ)
72		2cnd 12289	. . . . . . . . . 10 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → 2 ∈ ℂ)
73	67	a1i 11	. . . . . . . . . 10 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → 2 ≠ 0)
74	71, 4, 72, 10, 73	divdiv1d 12020	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → ((((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) / 2) = (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / (i · 2)))
75		2cn 12286	. . . . . . . . . . 11 ⊢ 2 ∈ ℂ
76	3, 75	mulcomi 11221	. . . . . . . . . 10 ⊢ (i · 2) = (2 · i)
77	76	oveq2i 7419	. . . . . . . . 9 ⊢ (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / (i · 2)) = (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / (2 · i))
78	74, 77	eqtrdi 2788	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → ((((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) / 2) = (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / (2 · i)))
79	8, 16, 4, 10	divsubdird 12028	. . . . . . . . . 10 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) = (((exp‘(i · 𝑥)) / i) − ((exp‘(-i · 𝑥)) / i)))
80	11, 17	negsubd 11576	. . . . . . . . . 10 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) / i) + -((exp‘(-i · 𝑥)) / i)) = (((exp‘(i · 𝑥)) / i) − ((exp‘(-i · 𝑥)) / i)))
81	79, 80	eqtr4d 2775	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) = (((exp‘(i · 𝑥)) / i) + -((exp‘(-i · 𝑥)) / i)))
82	81	oveq1d 7423	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → ((((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) / 2) = ((((exp‘(i · 𝑥)) / i) + -((exp‘(-i · 𝑥)) / i)) / 2))
83	78, 82	eqtr3d 2774	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / (2 · i)) = ((((exp‘(i · 𝑥)) / i) + -((exp‘(-i · 𝑥)) / i)) / 2))
84	83	mpteq2dva 5248	. . . . . 6 ⊢ (⊤ → (𝑥 ∈ ℂ ↦ (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / (2 · i))) = (𝑥 ∈ ℂ ↦ ((((exp‘(i · 𝑥)) / i) + -((exp‘(-i · 𝑥)) / i)) / 2)))
85	70, 84	eqtrid 2784	. . . . 5 ⊢ (⊤ → sin = (𝑥 ∈ ℂ ↦ ((((exp‘(i · 𝑥)) / i) + -((exp‘(-i · 𝑥)) / i)) / 2)))
86	85	oveq2d 7424	. . . 4 ⊢ (⊤ → (ℂ D sin) = (ℂ D (𝑥 ∈ ℂ ↦ ((((exp‘(i · 𝑥)) / i) + -((exp‘(-i · 𝑥)) / i)) / 2))))
87		df-cos 16013	. . . . 5 ⊢ cos = (𝑥 ∈ ℂ ↦ (((exp‘(i · 𝑥)) + (exp‘(-i · 𝑥))) / 2))
88	87	a1i 11	. . . 4 ⊢ (⊤ → cos = (𝑥 ∈ ℂ ↦ (((exp‘(i · 𝑥)) + (exp‘(-i · 𝑥))) / 2)))
89	69, 86, 88	3eqtr4d 2782	. . 3 ⊢ (⊤ → (ℂ D sin) = cos)
90	21, 46	addcld 11232	. . . . 5 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) · i) + ((exp‘(-i · 𝑥)) · -i)) ∈ ℂ)
91	2, 8, 21, 39, 16, 46, 55	dvmptadd 25476	. . . . 5 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ ((exp‘(i · 𝑥)) + (exp‘(-i · 𝑥))))) = (𝑥 ∈ ℂ ↦ (((exp‘(i · 𝑥)) · i) + ((exp‘(-i · 𝑥)) · -i))))
92	2, 20, 90, 91, 66, 68	dvmptdivc 25481	. . . 4 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ (((exp‘(i · 𝑥)) + (exp‘(-i · 𝑥))) / 2))) = (𝑥 ∈ ℂ ↦ ((((exp‘(i · 𝑥)) · i) + ((exp‘(-i · 𝑥)) · -i)) / 2)))
93	88	oveq2d 7424	. . . 4 ⊢ (⊤ → (ℂ D cos) = (ℂ D (𝑥 ∈ ℂ ↦ (((exp‘(i · 𝑥)) + (exp‘(-i · 𝑥))) / 2))))
94	71, 4, 10	divcld 11989	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) ∈ ℂ)
95	94, 72, 73	divnegd 12002	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → -((((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) / 2) = (-(((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) / 2))
96		sinval 16064	. . . . . . . . 9 ⊢ (𝑥 ∈ ℂ → (sin‘𝑥) = (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / (2 · i)))
97	96	adantl 482	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (sin‘𝑥) = (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / (2 · i)))
98	97, 78	eqtr4d 2775	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (sin‘𝑥) = ((((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) / 2))
99	98	negeqd 11453	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → -(sin‘𝑥) = -((((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) / 2))
100	3	negnegi 11529	. . . . . . . . . 10 ⊢ --i = i
101	100	oveq2i 7419	. . . . . . . . 9 ⊢ (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · --i) = (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · i)
102		mulneg2 11650	. . . . . . . . . 10 ⊢ ((((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) ∈ ℂ ∧ -i ∈ ℂ) → (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · --i) = -(((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · -i))
103	71, 12, 102	sylancl 586	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · --i) = -(((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · -i))
104	101, 103	eqtr3id 2786	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · i) = -(((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · -i))
105		mulcl 11193	. . . . . . . . . . 11 ⊢ (((exp‘(-i · 𝑥)) ∈ ℂ ∧ i ∈ ℂ) → ((exp‘(-i · 𝑥)) · i) ∈ ℂ)
106	16, 3, 105	sylancl 586	. . . . . . . . . 10 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → ((exp‘(-i · 𝑥)) · i) ∈ ℂ)
107	21, 106	negsubd 11576	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) · i) + -((exp‘(-i · 𝑥)) · i)) = (((exp‘(i · 𝑥)) · i) − ((exp‘(-i · 𝑥)) · i)))
108		mulneg2 11650	. . . . . . . . . . 11 ⊢ (((exp‘(-i · 𝑥)) ∈ ℂ ∧ i ∈ ℂ) → ((exp‘(-i · 𝑥)) · -i) = -((exp‘(-i · 𝑥)) · i))
109	16, 3, 108	sylancl 586	. . . . . . . . . 10 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → ((exp‘(-i · 𝑥)) · -i) = -((exp‘(-i · 𝑥)) · i))
110	109	oveq2d 7424	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) · i) + ((exp‘(-i · 𝑥)) · -i)) = (((exp‘(i · 𝑥)) · i) + -((exp‘(-i · 𝑥)) · i)))
111	8, 16, 4	subdird 11670	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · i) = (((exp‘(i · 𝑥)) · i) − ((exp‘(-i · 𝑥)) · i)))
112	107, 110, 111	3eqtr4d 2782	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) · i) + ((exp‘(-i · 𝑥)) · -i)) = (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · i))
113	71, 4, 10	divrecd 11992	. . . . . . . . . 10 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) = (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · (1 / i)))
114		irec 14164	. . . . . . . . . . 11 ⊢ (1 / i) = -i
115	114	oveq2i 7419	. . . . . . . . . 10 ⊢ (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · (1 / i)) = (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · -i)
116	113, 115	eqtrdi 2788	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) = (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · -i))
117	116	negeqd 11453	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → -(((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) = -(((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · -i))
118	104, 112, 117	3eqtr4d 2782	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) · i) + ((exp‘(-i · 𝑥)) · -i)) = -(((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i))
119	118	oveq1d 7423	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → ((((exp‘(i · 𝑥)) · i) + ((exp‘(-i · 𝑥)) · -i)) / 2) = (-(((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) / 2))
120	95, 99, 119	3eqtr4d 2782	. . . . 5 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → -(sin‘𝑥) = ((((exp‘(i · 𝑥)) · i) + ((exp‘(-i · 𝑥)) · -i)) / 2))
121	120	mpteq2dva 5248	. . . 4 ⊢ (⊤ → (𝑥 ∈ ℂ ↦ -(sin‘𝑥)) = (𝑥 ∈ ℂ ↦ ((((exp‘(i · 𝑥)) · i) + ((exp‘(-i · 𝑥)) · -i)) / 2)))
122	92, 93, 121	3eqtr4d 2782	. . 3 ⊢ (⊤ → (ℂ D cos) = (𝑥 ∈ ℂ ↦ -(sin‘𝑥)))
123	89, 122	jca 512	. 2 ⊢ (⊤ → ((ℂ D sin) = cos ∧ (ℂ D cos) = (𝑥 ∈ ℂ ↦ -(sin‘𝑥))))
124	123	mptru 1548	1 ⊢ ((ℂ D sin) = cos ∧ (ℂ D cos) = (𝑥 ∈ ℂ ↦ -(sin‘𝑥)))

Colors of variables: wff setvar class

Syntax hints: ∧ wa 396 = wceq 1541 ⊤wtru 1542 ∈ wcel 2106 ≠ wne 2940 {cpr 4630 ↦ cmpt 5231 ⟶wf 6539 ‘cfv 6543 (class class class)co 7408 ℂcc 11107 ℝcr 11108 0cc0 11109 1c1 11110 ici 11111 + caddc 11112 · cmul 11114 − cmin 11443 -cneg 11444 / cdiv 11870 2c2 12266 expce 16004 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: dvsin 25498 dvcos 25499

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