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Theorem dvsincos 25834

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 11209	. . . . . 6 ⊢ ℂ ∈ {ℝ, ℂ}
2	1	a1i 11	. . . . 5 ⊢ (⊤ → ℂ ∈ {ℝ, ℂ})
3		ax-icn 11175	. . . . . . . . . 10 ⊢ i ∈ ℂ
4	3	a1i 11	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → i ∈ ℂ)
5		simpr 484	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → 𝑥 ∈ ℂ)
6	4, 5	mulcld 11241	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (i · 𝑥) ∈ ℂ)
7		efcl 16033	. . . . . . . 8 ⊢ ((i · 𝑥) ∈ ℂ → (exp‘(i · 𝑥)) ∈ ℂ)
8	6, 7	syl 17	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (exp‘(i · 𝑥)) ∈ ℂ)
9		ine0 11656	. . . . . . . 8 ⊢ i ≠ 0
10	9	a1i 11	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → i ≠ 0)
11	8, 4, 10	divcld 11997	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → ((exp‘(i · 𝑥)) / i) ∈ ℂ)
12		negicn 11468	. . . . . . . . . 10 ⊢ -i ∈ ℂ
13		mulcl 11200	. . . . . . . . . 10 ⊢ ((-i ∈ ℂ ∧ 𝑥 ∈ ℂ) → (-i · 𝑥) ∈ ℂ)
14	12, 5, 13	sylancr 586	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (-i · 𝑥) ∈ ℂ)
15		efcl 16033	. . . . . . . . 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 11997	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → ((exp‘(-i · 𝑥)) / i) ∈ ℂ)
18	17	negcld 11565	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → -((exp‘(-i · 𝑥)) / i) ∈ ℂ)
19	11, 18	addcld 11240	. . . . 5 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) / i) + -((exp‘(-i · 𝑥)) / i)) ∈ ℂ)
20	8, 16	addcld 11240	. . . . 5 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → ((exp‘(i · 𝑥)) + (exp‘(-i · 𝑥))) ∈ ℂ)
21	8, 4	mulcld 11241	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → ((exp‘(i · 𝑥)) · i) ∈ ℂ)
22		efcl 16033	. . . . . . . . . 10 ⊢ (𝑦 ∈ ℂ → (exp‘𝑦) ∈ ℂ)
23	22	adantl 481	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑦 ∈ ℂ) → (exp‘𝑦) ∈ ℂ)
24		1cnd 11216	. . . . . . . . . . 11 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → 1 ∈ ℂ)
25	2	dvmptid 25810	. . . . . . . . . . 11 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ 𝑥)) = (𝑥 ∈ ℂ ↦ 1))
26	3	a1i 11	. . . . . . . . . . 11 ⊢ (⊤ → i ∈ ℂ)
27	2, 5, 24, 25, 26	dvmptcmul 25817	. . . . . . . . . 10 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ (i · 𝑥))) = (𝑥 ∈ ℂ ↦ (i · 1)))
28	3	mulridi 11225	. . . . . . . . . . 11 ⊢ (i · 1) = i
29	28	mpteq2i 5253	. . . . . . . . . 10 ⊢ (𝑥 ∈ ℂ ↦ (i · 1)) = (𝑥 ∈ ℂ ↦ i)
30	27, 29	eqtrdi 2787	. . . . . . . . 9 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ (i · 𝑥))) = (𝑥 ∈ ℂ ↦ i))
31		eff 16032	. . . . . . . . . . . . 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 7428	. . . . . . . . . 10 ⊢ (⊤ → (ℂ D exp) = (ℂ D (𝑦 ∈ ℂ ↦ (exp‘𝑦))))
35		dvef 25833	. . . . . . . . . . 11 ⊢ (ℂ D exp) = exp
36	35, 33	eqtrid 2783	. . . . . . . . . 10 ⊢ (⊤ → (ℂ D exp) = (𝑦 ∈ ℂ ↦ (exp‘𝑦)))
37	34, 36	eqtr3d 2773	. . . . . . . . 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 25825	. . . . . . . 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 25818	. . . . . . 7 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ ((exp‘(i · 𝑥)) / i))) = (𝑥 ∈ ℂ ↦ (((exp‘(i · 𝑥)) · i) / i)))
42	8, 4, 10	divcan4d 12003	. . . . . . . 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 2771	. . . . . 6 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ ((exp‘(i · 𝑥)) / i))) = (𝑥 ∈ ℂ ↦ (exp‘(i · 𝑥))))
45		mulcl 11200	. . . . . . . . . 10 ⊢ (((exp‘(-i · 𝑥)) ∈ ℂ ∧ -i ∈ ℂ) → ((exp‘(-i · 𝑥)) · -i) ∈ ℂ)
46	16, 12, 45	sylancl 585	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → ((exp‘(-i · 𝑥)) · -i) ∈ ℂ)
47	46, 4, 10	divcld 11997	. . . . . . . 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 25817	. . . . . . . . . . 11 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ (-i · 𝑥))) = (𝑥 ∈ ℂ ↦ (-i · 1)))
51	12	mulridi 11225	. . . . . . . . . . . 12 ⊢ (-i · 1) = -i
52	51	mpteq2i 5253	. . . . . . . . . . 11 ⊢ (𝑥 ∈ ℂ ↦ (-i · 1)) = (𝑥 ∈ ℂ ↦ -i)
53	50, 52	eqtrdi 2787	. . . . . . . . . 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 25825	. . . . . . . . 9 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ (exp‘(-i · 𝑥)))) = (𝑥 ∈ ℂ ↦ ((exp‘(-i · 𝑥)) · -i)))
56	2, 16, 46, 55, 26, 40	dvmptdivc 25818	. . . . . . . 8 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ ((exp‘(-i · 𝑥)) / i))) = (𝑥 ∈ ℂ ↦ (((exp‘(-i · 𝑥)) · -i) / i)))
57	2, 17, 47, 56	dvmptneg 25819	. . . . . . 7 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ -((exp‘(-i · 𝑥)) / i))) = (𝑥 ∈ ℂ ↦ -(((exp‘(-i · 𝑥)) · -i) / i)))
58	46, 4, 10	divneg2d 12011	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → -(((exp‘(-i · 𝑥)) · -i) / i) = (((exp‘(-i · 𝑥)) · -i) / -i))
59	3, 9	negne0i 11542	. . . . . . . . . . 11 ⊢ -i ≠ 0
60	59	a1i 11	. . . . . . . . . 10 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → -i ≠ 0)
61	16, 48, 60	divcan4d 12003	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(-i · 𝑥)) · -i) / -i) = (exp‘(-i · 𝑥)))
62	58, 61	eqtrd 2771	. . . . . . . 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 2771	. . . . . 6 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ -((exp‘(-i · 𝑥)) / i))) = (𝑥 ∈ ℂ ↦ (exp‘(-i · 𝑥))))
65	2, 11, 8, 44, 18, 16, 64	dvmptadd 25813	. . . . 5 ⊢ (⊤ → (ℂ D (𝑥 ∈ ℂ ↦ (((exp‘(i · 𝑥)) / i) + -((exp‘(-i · 𝑥)) / i)))) = (𝑥 ∈ ℂ ↦ ((exp‘(i · 𝑥)) + (exp‘(-i · 𝑥)))))
66		2cnd 12297	. . . . 5 ⊢ (⊤ → 2 ∈ ℂ)
67		2ne0 12323	. . . . . 6 ⊢ 2 ≠ 0
68	67	a1i 11	. . . . 5 ⊢ (⊤ → 2 ≠ 0)
69	2, 19, 20, 65, 66, 68	dvmptdivc 25818	. . . 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 16020	. . . . . 6 ⊢ sin = (𝑥 ∈ ℂ ↦ (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / (2 · i)))
71	8, 16	subcld 11578	. . . . . . . . . 10 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → ((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) ∈ ℂ)
72		2cnd 12297	. . . . . . . . . 10 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → 2 ∈ ℂ)
73	67	a1i 11	. . . . . . . . . 10 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → 2 ≠ 0)
74	71, 4, 72, 10, 73	divdiv1d 12028	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → ((((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) / 2) = (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / (i · 2)))
75		2cn 12294	. . . . . . . . . . 11 ⊢ 2 ∈ ℂ
76	3, 75	mulcomi 11229	. . . . . . . . . 10 ⊢ (i · 2) = (2 · i)
77	76	oveq2i 7423	. . . . . . . . 9 ⊢ (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / (i · 2)) = (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / (2 · i))
78	74, 77	eqtrdi 2787	. . . . . . . 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 12036	. . . . . . . . . 10 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) = (((exp‘(i · 𝑥)) / i) − ((exp‘(-i · 𝑥)) / i)))
80	11, 17	negsubd 11584	. . . . . . . . . 10 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) / i) + -((exp‘(-i · 𝑥)) / i)) = (((exp‘(i · 𝑥)) / i) − ((exp‘(-i · 𝑥)) / i)))
81	79, 80	eqtr4d 2774	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) = (((exp‘(i · 𝑥)) / i) + -((exp‘(-i · 𝑥)) / i)))
82	81	oveq1d 7427	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → ((((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) / 2) = ((((exp‘(i · 𝑥)) / i) + -((exp‘(-i · 𝑥)) / i)) / 2))
83	78, 82	eqtr3d 2773	. . . . . . 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 2783	. . . . 5 ⊢ (⊤ → sin = (𝑥 ∈ ℂ ↦ ((((exp‘(i · 𝑥)) / i) + -((exp‘(-i · 𝑥)) / i)) / 2)))
86	85	oveq2d 7428	. . . 4 ⊢ (⊤ → (ℂ D sin) = (ℂ D (𝑥 ∈ ℂ ↦ ((((exp‘(i · 𝑥)) / i) + -((exp‘(-i · 𝑥)) / i)) / 2))))
87		df-cos 16021	. . . . 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 2781	. . 3 ⊢ (⊤ → (ℂ D sin) = cos)
90	21, 46	addcld 11240	. . . . 5 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) · i) + ((exp‘(-i · 𝑥)) · -i)) ∈ ℂ)
91	2, 8, 21, 39, 16, 46, 55	dvmptadd 25813	. . . . 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 25818	. . . 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 7428	. . . 4 ⊢ (⊤ → (ℂ D cos) = (ℂ D (𝑥 ∈ ℂ ↦ (((exp‘(i · 𝑥)) + (exp‘(-i · 𝑥))) / 2))))
94	71, 4, 10	divcld 11997	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) ∈ ℂ)
95	94, 72, 73	divnegd 12010	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → -((((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) / 2) = (-(((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) / 2))
96		sinval 16072	. . . . . . . . 9 ⊢ (𝑥 ∈ ℂ → (sin‘𝑥) = (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / (2 · i)))
97	96	adantl 481	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (sin‘𝑥) = (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / (2 · i)))
98	97, 78	eqtr4d 2774	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (sin‘𝑥) = ((((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) / 2))
99	98	negeqd 11461	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → -(sin‘𝑥) = -((((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) / 2))
100	3	negnegi 11537	. . . . . . . . . 10 ⊢ --i = i
101	100	oveq2i 7423	. . . . . . . . 9 ⊢ (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · --i) = (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · i)
102		mulneg2 11658	. . . . . . . . . 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 585	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · --i) = -(((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · -i))
104	101, 103	eqtr3id 2785	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · i) = -(((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · -i))
105		mulcl 11200	. . . . . . . . . . 11 ⊢ (((exp‘(-i · 𝑥)) ∈ ℂ ∧ i ∈ ℂ) → ((exp‘(-i · 𝑥)) · i) ∈ ℂ)
106	16, 3, 105	sylancl 585	. . . . . . . . . 10 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → ((exp‘(-i · 𝑥)) · i) ∈ ℂ)
107	21, 106	negsubd 11584	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) · i) + -((exp‘(-i · 𝑥)) · i)) = (((exp‘(i · 𝑥)) · i) − ((exp‘(-i · 𝑥)) · i)))
108		mulneg2 11658	. . . . . . . . . . 11 ⊢ (((exp‘(-i · 𝑥)) ∈ ℂ ∧ i ∈ ℂ) → ((exp‘(-i · 𝑥)) · -i) = -((exp‘(-i · 𝑥)) · i))
109	16, 3, 108	sylancl 585	. . . . . . . . . 10 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → ((exp‘(-i · 𝑥)) · -i) = -((exp‘(-i · 𝑥)) · i))
110	109	oveq2d 7428	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) · i) + ((exp‘(-i · 𝑥)) · -i)) = (((exp‘(i · 𝑥)) · i) + -((exp‘(-i · 𝑥)) · i)))
111	8, 16, 4	subdird 11678	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · i) = (((exp‘(i · 𝑥)) · i) − ((exp‘(-i · 𝑥)) · i)))
112	107, 110, 111	3eqtr4d 2781	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) · i) + ((exp‘(-i · 𝑥)) · -i)) = (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · i))
113	71, 4, 10	divrecd 12000	. . . . . . . . . 10 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) = (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · (1 / i)))
114		irec 14172	. . . . . . . . . . 11 ⊢ (1 / i) = -i
115	114	oveq2i 7423	. . . . . . . . . 10 ⊢ (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · (1 / i)) = (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · -i)
116	113, 115	eqtrdi 2787	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) = (((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · -i))
117	116	negeqd 11461	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → -(((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i) = -(((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) · -i))
118	104, 112, 117	3eqtr4d 2781	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℂ) → (((exp‘(i · 𝑥)) · i) + ((exp‘(-i · 𝑥)) · -i)) = -(((exp‘(i · 𝑥)) − (exp‘(-i · 𝑥))) / i))
119	118	oveq1d 7427	. . . . . 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 2781	. . . . 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 2781	. . 3 ⊢ (⊤ → (ℂ D cos) = (𝑥 ∈ ℂ ↦ -(sin‘𝑥)))
123	89, 122	jca 511	. 2 ⊢ (⊤ → ((ℂ D sin) = cos ∧ (ℂ D cos) = (𝑥 ∈ ℂ ↦ -(sin‘𝑥))))
124	123	mptru 1547	1 ⊢ ((ℂ D sin) = cos ∧ (ℂ D cos) = (𝑥 ∈ ℂ ↦ -(sin‘𝑥)))

Colors of variables: wff setvar class

Syntax hints: ∧ wa 395 = wceq 1540 ⊤wtru 1541 ∈ wcel 2105 ≠ wne 2939 {cpr 4630 ↦ cmpt 5231 ⟶wf 6539 ‘cfv 6543 (class class class)co 7412 ℂcc 11114 ℝcr 11115 0cc0 11116 1c1 11117 ici 11118 + caddc 11119 · cmul 11121 − cmin 11451 -cneg 11452 / cdiv 11878 2c2 12274 expce 16012 sincsin 16014 cosccos 16015 D cdv 25713

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1912 ax-6 1970 ax-7 2010 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2153 ax-12 2170 ax-ext 2702 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7729 ax-inf2 9642 ax-cnex 11172 ax-resscn 11173 ax-1cn 11174 ax-icn 11175 ax-addcl 11176 ax-addrcl 11177 ax-mulcl 11178 ax-mulrcl 11179 ax-mulcom 11180 ax-addass 11181 ax-mulass 11182 ax-distr 11183 ax-i2m1 11184 ax-1ne0 11185 ax-1rid 11186 ax-rnegex 11187 ax-rrecex 11188 ax-cnre 11189 ax-pre-lttri 11190 ax-pre-lttrn 11191 ax-pre-ltadd 11192 ax-pre-mulgt0 11193 ax-pre-sup 11194 ax-addf 11195

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1781 df-nf 1785 df-sb 2067 df-mo 2533 df-eu 2562 df-clab 2709 df-cleq 2723 df-clel 2809 df-nfc 2884 df-ne 2940 df-nel 3046 df-ral 3061 df-rex 3070 df-rmo 3375 df-reu 3376 df-rab 3432 df-v 3475 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 7368 df-ov 7415 df-oprab 7416 df-mpo 7417 df-of 7674 df-om 7860 df-1st 7979 df-2nd 7980 df-supp 8152 df-frecs 8272 df-wrecs 8303 df-recs 8377 df-rdg 8416 df-1o 8472 df-2o 8473 df-er 8709 df-map 8828 df-pm 8829 df-ixp 8898 df-en 8946 df-dom 8947 df-sdom 8948 df-fin 8949 df-fsupp 9368 df-fi 9412 df-sup 9443 df-inf 9444 df-oi 9511 df-card 9940 df-pnf 11257 df-mnf 11258 df-xr 11259 df-ltxr 11260 df-le 11261 df-sub 11453 df-neg 11454 df-div 11879 df-nn 12220 df-2 12282 df-3 12283 df-4 12284 df-5 12285 df-6 12286 df-7 12287 df-8 12288 df-9 12289 df-n0 12480 df-z 12566 df-dec 12685 df-uz 12830 df-q 12940 df-rp 12982 df-xneg 13099 df-xadd 13100 df-xmul 13101 df-ico 13337 df-icc 13338 df-fz 13492 df-fzo 13635 df-fl 13764 df-seq 13974 df-exp 14035 df-fac 14241 df-bc 14270 df-hash 14298 df-shft 15021 df-cj 15053 df-re 15054 df-im 15055 df-sqrt 15189 df-abs 15190 df-limsup 15422 df-clim 15439 df-rlim 15440 df-sum 15640 df-ef 16018 df-sin 16020 df-cos 16021 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 19229 df-cmn 19698 df-psmet 21226 df-xmet 21227 df-met 21228 df-bl 21229 df-mopn 21230 df-fbas 21231 df-fg 21232 df-cnfld 21235 df-top 22717 df-topon 22734 df-topsp 22756 df-bases 22770 df-cld 22844 df-ntr 22845 df-cls 22846 df-nei 22923 df-lp 22961 df-perf 22962 df-cn 23052 df-cnp 23053 df-haus 23140 df-tx 23387 df-hmeo 23580 df-fil 23671 df-fm 23763 df-flim 23764 df-flf 23765 df-xms 24147 df-ms 24148 df-tms 24149 df-cncf 24719 df-limc 25716 df-dv 25717

This theorem is referenced by: dvsin 25835 dvcos 25836

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