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Theorem ptolemy 26451

Description: Ptolemy's Theorem. This theorem is named after the Greek astronomer and mathematician Ptolemy (Claudius Ptolemaeus). This particular version is expressed using the sine function. It is proved by expanding all the multiplication of sines to a product of cosines of differences using sinmul 16156, then using algebraic simplification to show that both sides are equal. This formalization is based on the proof in "Trigonometry" by Gelfand and Saul. This is Metamath 100 proof #95. (Contributed by David A. Wheeler, 31-May-2015.)

**Assertion**
Ref	Expression
ptolemy	⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (((sin‘𝐴) · (sin‘𝐵)) + ((sin‘𝐶) · (sin‘𝐷))) = ((sin‘(𝐵 + 𝐶)) · (sin‘(𝐴 + 𝐶))))

**Proof of Theorem ptolemy**
Step	Hyp	Ref	Expression
1		addcl 11228	. . . . . . . . . . 11 ⊢ ((𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) → (𝐶 + 𝐷) ∈ ℂ)
2	1	3ad2ant2 1131	. . . . . . . . . 10 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (𝐶 + 𝐷) ∈ ℂ)
3	2	coscld 16115	. . . . . . . . 9 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (cos‘(𝐶 + 𝐷)) ∈ ℂ)
4	3	negnegd 11600	. . . . . . . 8 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → --(cos‘(𝐶 + 𝐷)) = (cos‘(𝐶 + 𝐷)))
5		addlid 11435	. . . . . . . . . . . . . . 15 ⊢ ((𝐶 + 𝐷) ∈ ℂ → (0 + (𝐶 + 𝐷)) = (𝐶 + 𝐷))
6	5	oveq1d 7441	. . . . . . . . . . . . . 14 ⊢ ((𝐶 + 𝐷) ∈ ℂ → ((0 + (𝐶 + 𝐷)) − ((𝐴 + 𝐵) + (𝐶 + 𝐷))) = ((𝐶 + 𝐷) − ((𝐴 + 𝐵) + (𝐶 + 𝐷))))
7	2, 6	syl 17	. . . . . . . . . . . . 13 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((0 + (𝐶 + 𝐷)) − ((𝐴 + 𝐵) + (𝐶 + 𝐷))) = ((𝐶 + 𝐷) − ((𝐴 + 𝐵) + (𝐶 + 𝐷))))
8		0cnd 11245	. . . . . . . . . . . . . 14 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → 0 ∈ ℂ)
9		addcl 11228	. . . . . . . . . . . . . . . 16 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 + 𝐵) ∈ ℂ)
10	9	adantr 479	. . . . . . . . . . . . . . 15 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ)) → (𝐴 + 𝐵) ∈ ℂ)
11	10	3adant3 1129	. . . . . . . . . . . . . 14 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (𝐴 + 𝐵) ∈ ℂ)
12	8, 11, 2	pnpcan2d 11647	. . . . . . . . . . . . 13 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((0 + (𝐶 + 𝐷)) − ((𝐴 + 𝐵) + (𝐶 + 𝐷))) = (0 − (𝐴 + 𝐵)))
13		simp3 1135	. . . . . . . . . . . . . 14 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π)
14	13	oveq2d 7442	. . . . . . . . . . . . 13 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((𝐶 + 𝐷) − ((𝐴 + 𝐵) + (𝐶 + 𝐷))) = ((𝐶 + 𝐷) − π))
15	7, 12, 14	3eqtr3rd 2777	. . . . . . . . . . . 12 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((𝐶 + 𝐷) − π) = (0 − (𝐴 + 𝐵)))
16		df-neg 11485	. . . . . . . . . . . 12 ⊢ -(𝐴 + 𝐵) = (0 − (𝐴 + 𝐵))
17	15, 16	eqtr4di 2786	. . . . . . . . . . 11 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((𝐶 + 𝐷) − π) = -(𝐴 + 𝐵))
18	17	fveq2d 6906	. . . . . . . . . 10 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (cos‘((𝐶 + 𝐷) − π)) = (cos‘-(𝐴 + 𝐵)))
19		cosmpi 26443	. . . . . . . . . . 11 ⊢ ((𝐶 + 𝐷) ∈ ℂ → (cos‘((𝐶 + 𝐷) − π)) = -(cos‘(𝐶 + 𝐷)))
20	2, 19	syl 17	. . . . . . . . . 10 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (cos‘((𝐶 + 𝐷) − π)) = -(cos‘(𝐶 + 𝐷)))
21		cosneg 16131	. . . . . . . . . . 11 ⊢ ((𝐴 + 𝐵) ∈ ℂ → (cos‘-(𝐴 + 𝐵)) = (cos‘(𝐴 + 𝐵)))
22	11, 21	syl 17	. . . . . . . . . 10 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (cos‘-(𝐴 + 𝐵)) = (cos‘(𝐴 + 𝐵)))
23	18, 20, 22	3eqtr3d 2776	. . . . . . . . 9 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → -(cos‘(𝐶 + 𝐷)) = (cos‘(𝐴 + 𝐵)))
24	23	negeqd 11492	. . . . . . . 8 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → --(cos‘(𝐶 + 𝐷)) = -(cos‘(𝐴 + 𝐵)))
25	4, 24	eqtr3d 2770	. . . . . . 7 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (cos‘(𝐶 + 𝐷)) = -(cos‘(𝐴 + 𝐵)))
26	25	oveq2d 7442	. . . . . 6 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((cos‘(𝐶 − 𝐷)) − (cos‘(𝐶 + 𝐷))) = ((cos‘(𝐶 − 𝐷)) − -(cos‘(𝐴 + 𝐵))))
27		subcl 11497	. . . . . . . . . 10 ⊢ ((𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) → (𝐶 − 𝐷) ∈ ℂ)
28	27	adantl 480	. . . . . . . . 9 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ)) → (𝐶 − 𝐷) ∈ ℂ)
29	28	coscld 16115	. . . . . . . 8 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ)) → (cos‘(𝐶 − 𝐷)) ∈ ℂ)
30	29	3adant3 1129	. . . . . . 7 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (cos‘(𝐶 − 𝐷)) ∈ ℂ)
31	11	coscld 16115	. . . . . . 7 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (cos‘(𝐴 + 𝐵)) ∈ ℂ)
32	30, 31	subnegd 11616	. . . . . 6 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((cos‘(𝐶 − 𝐷)) − -(cos‘(𝐴 + 𝐵))) = ((cos‘(𝐶 − 𝐷)) + (cos‘(𝐴 + 𝐵))))
33	26, 32	eqtrd 2768	. . . . 5 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((cos‘(𝐶 − 𝐷)) − (cos‘(𝐶 + 𝐷))) = ((cos‘(𝐶 − 𝐷)) + (cos‘(𝐴 + 𝐵))))
34	33	oveq1d 7441	. . . 4 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (((cos‘(𝐶 − 𝐷)) − (cos‘(𝐶 + 𝐷))) / 2) = (((cos‘(𝐶 − 𝐷)) + (cos‘(𝐴 + 𝐵))) / 2))
35	34	oveq2d 7442	. . 3 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((((cos‘(𝐴 − 𝐵)) − (cos‘(𝐴 + 𝐵))) / 2) + (((cos‘(𝐶 − 𝐷)) − (cos‘(𝐶 + 𝐷))) / 2)) = ((((cos‘(𝐴 − 𝐵)) − (cos‘(𝐴 + 𝐵))) / 2) + (((cos‘(𝐶 − 𝐷)) + (cos‘(𝐴 + 𝐵))) / 2)))
36		subcl 11497	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 − 𝐵) ∈ ℂ)
37	36	3ad2ant1 1130	. . . . . . 7 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (𝐴 − 𝐵) ∈ ℂ)
38	37	coscld 16115	. . . . . 6 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (cos‘(𝐴 − 𝐵)) ∈ ℂ)
39	38, 31	subcld 11609	. . . . 5 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((cos‘(𝐴 − 𝐵)) − (cos‘(𝐴 + 𝐵))) ∈ ℂ)
40	30, 31	addcld 11271	. . . . 5 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((cos‘(𝐶 − 𝐷)) + (cos‘(𝐴 + 𝐵))) ∈ ℂ)
41		2cnne0 12460	. . . . . 6 ⊢ (2 ∈ ℂ ∧ 2 ≠ 0)
42	41	a1i 11	. . . . 5 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (2 ∈ ℂ ∧ 2 ≠ 0))
43		divdir 11935	. . . . 5 ⊢ ((((cos‘(𝐴 − 𝐵)) − (cos‘(𝐴 + 𝐵))) ∈ ℂ ∧ ((cos‘(𝐶 − 𝐷)) + (cos‘(𝐴 + 𝐵))) ∈ ℂ ∧ (2 ∈ ℂ ∧ 2 ≠ 0)) → ((((cos‘(𝐴 − 𝐵)) − (cos‘(𝐴 + 𝐵))) + ((cos‘(𝐶 − 𝐷)) + (cos‘(𝐴 + 𝐵)))) / 2) = ((((cos‘(𝐴 − 𝐵)) − (cos‘(𝐴 + 𝐵))) / 2) + (((cos‘(𝐶 − 𝐷)) + (cos‘(𝐴 + 𝐵))) / 2)))
44	39, 40, 42, 43	syl3anc 1368	. . . 4 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((((cos‘(𝐴 − 𝐵)) − (cos‘(𝐴 + 𝐵))) + ((cos‘(𝐶 − 𝐷)) + (cos‘(𝐴 + 𝐵)))) / 2) = ((((cos‘(𝐴 − 𝐵)) − (cos‘(𝐴 + 𝐵))) / 2) + (((cos‘(𝐶 − 𝐷)) + (cos‘(𝐴 + 𝐵))) / 2)))
45	38, 31, 30	nppcan3d 11636	. . . . 5 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (((cos‘(𝐴 − 𝐵)) − (cos‘(𝐴 + 𝐵))) + ((cos‘(𝐶 − 𝐷)) + (cos‘(𝐴 + 𝐵)))) = ((cos‘(𝐴 − 𝐵)) + (cos‘(𝐶 − 𝐷))))
46	45	oveq1d 7441	. . . 4 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((((cos‘(𝐴 − 𝐵)) − (cos‘(𝐴 + 𝐵))) + ((cos‘(𝐶 − 𝐷)) + (cos‘(𝐴 + 𝐵)))) / 2) = (((cos‘(𝐴 − 𝐵)) + (cos‘(𝐶 − 𝐷))) / 2))
47	44, 46	eqtr3d 2770	. . 3 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((((cos‘(𝐴 − 𝐵)) − (cos‘(𝐴 + 𝐵))) / 2) + (((cos‘(𝐶 − 𝐷)) + (cos‘(𝐴 + 𝐵))) / 2)) = (((cos‘(𝐴 − 𝐵)) + (cos‘(𝐶 − 𝐷))) / 2))
48	35, 47	eqtrd 2768	. 2 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((((cos‘(𝐴 − 𝐵)) − (cos‘(𝐴 + 𝐵))) / 2) + (((cos‘(𝐶 − 𝐷)) − (cos‘(𝐶 + 𝐷))) / 2)) = (((cos‘(𝐴 − 𝐵)) + (cos‘(𝐶 − 𝐷))) / 2))
49		sinmul 16156	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((sin‘𝐴) · (sin‘𝐵)) = (((cos‘(𝐴 − 𝐵)) − (cos‘(𝐴 + 𝐵))) / 2))
50	49	3ad2ant1 1130	. . 3 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((sin‘𝐴) · (sin‘𝐵)) = (((cos‘(𝐴 − 𝐵)) − (cos‘(𝐴 + 𝐵))) / 2))
51		sinmul 16156	. . . 4 ⊢ ((𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) → ((sin‘𝐶) · (sin‘𝐷)) = (((cos‘(𝐶 − 𝐷)) − (cos‘(𝐶 + 𝐷))) / 2))
52	51	3ad2ant2 1131	. . 3 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((sin‘𝐶) · (sin‘𝐷)) = (((cos‘(𝐶 − 𝐷)) − (cos‘(𝐶 + 𝐷))) / 2))
53	50, 52	oveq12d 7444	. 2 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (((sin‘𝐴) · (sin‘𝐵)) + ((sin‘𝐶) · (sin‘𝐷))) = ((((cos‘(𝐴 − 𝐵)) − (cos‘(𝐴 + 𝐵))) / 2) + (((cos‘(𝐶 − 𝐷)) − (cos‘(𝐶 + 𝐷))) / 2)))
54		simplr 767	. . . . . . . . 9 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ)) → 𝐵 ∈ ℂ)
55		simpll 765	. . . . . . . . 9 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ)) → 𝐴 ∈ ℂ)
56		simprl 769	. . . . . . . . 9 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ)) → 𝐶 ∈ ℂ)
57	54, 55, 56	pnpcan2d 11647	. . . . . . . 8 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ)) → ((𝐵 + 𝐶) − (𝐴 + 𝐶)) = (𝐵 − 𝐴))
58	57	fveq2d 6906	. . . . . . 7 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ)) → (cos‘((𝐵 + 𝐶) − (𝐴 + 𝐶))) = (cos‘(𝐵 − 𝐴)))
59	58	3adant3 1129	. . . . . 6 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (cos‘((𝐵 + 𝐶) − (𝐴 + 𝐶))) = (cos‘(𝐵 − 𝐴)))
60	1	adantl 480	. . . . . . . . . . . . 13 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ)) → (𝐶 + 𝐷) ∈ ℂ)
61	10, 60, 28	3jca 1125	. . . . . . . . . . . 12 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ)) → ((𝐴 + 𝐵) ∈ ℂ ∧ (𝐶 + 𝐷) ∈ ℂ ∧ (𝐶 − 𝐷) ∈ ℂ))
62	61	3adant3 1129	. . . . . . . . . . 11 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((𝐴 + 𝐵) ∈ ℂ ∧ (𝐶 + 𝐷) ∈ ℂ ∧ (𝐶 − 𝐷) ∈ ℂ))
63		addass 11233	. . . . . . . . . . 11 ⊢ (((𝐴 + 𝐵) ∈ ℂ ∧ (𝐶 + 𝐷) ∈ ℂ ∧ (𝐶 − 𝐷) ∈ ℂ) → (((𝐴 + 𝐵) + (𝐶 + 𝐷)) + (𝐶 − 𝐷)) = ((𝐴 + 𝐵) + ((𝐶 + 𝐷) + (𝐶 − 𝐷))))
64	62, 63	syl 17	. . . . . . . . . 10 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (((𝐴 + 𝐵) + (𝐶 + 𝐷)) + (𝐶 − 𝐷)) = ((𝐴 + 𝐵) + ((𝐶 + 𝐷) + (𝐶 − 𝐷))))
65		oveq1 7433	. . . . . . . . . . 11 ⊢ (((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π → (((𝐴 + 𝐵) + (𝐶 + 𝐷)) + (𝐶 − 𝐷)) = (π + (𝐶 − 𝐷)))
66	65	3ad2ant3 1132	. . . . . . . . . 10 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (((𝐴 + 𝐵) + (𝐶 + 𝐷)) + (𝐶 − 𝐷)) = (π + (𝐶 − 𝐷)))
67		simpl 481	. . . . . . . . . . . . . 14 ⊢ ((𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) → 𝐶 ∈ ℂ)
68		simpr 483	. . . . . . . . . . . . . 14 ⊢ ((𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) → 𝐷 ∈ ℂ)
69	67, 68, 67	3jca 1125	. . . . . . . . . . . . 13 ⊢ ((𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) → (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ ∧ 𝐶 ∈ ℂ))
70	69	3ad2ant2 1131	. . . . . . . . . . . 12 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ ∧ 𝐶 ∈ ℂ))
71		ppncan 11540	. . . . . . . . . . . . 13 ⊢ ((𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ ∧ 𝐶 ∈ ℂ) → ((𝐶 + 𝐷) + (𝐶 − 𝐷)) = (𝐶 + 𝐶))
72	71	oveq2d 7442	. . . . . . . . . . . 12 ⊢ ((𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ ∧ 𝐶 ∈ ℂ) → ((𝐴 + 𝐵) + ((𝐶 + 𝐷) + (𝐶 − 𝐷))) = ((𝐴 + 𝐵) + (𝐶 + 𝐶)))
73	70, 72	syl 17	. . . . . . . . . . 11 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((𝐴 + 𝐵) + ((𝐶 + 𝐷) + (𝐶 − 𝐷))) = ((𝐴 + 𝐵) + (𝐶 + 𝐶)))
74		simp1 1133	. . . . . . . . . . . 12 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ))
75	67, 67	jca 510	. . . . . . . . . . . . 13 ⊢ ((𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) → (𝐶 ∈ ℂ ∧ 𝐶 ∈ ℂ))
76	75	3ad2ant2 1131	. . . . . . . . . . . 12 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (𝐶 ∈ ℂ ∧ 𝐶 ∈ ℂ))
77		add4 11472	. . . . . . . . . . . 12 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐶 ∈ ℂ)) → ((𝐴 + 𝐵) + (𝐶 + 𝐶)) = ((𝐴 + 𝐶) + (𝐵 + 𝐶)))
78	74, 76, 77	syl2anc 582	. . . . . . . . . . 11 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((𝐴 + 𝐵) + (𝐶 + 𝐶)) = ((𝐴 + 𝐶) + (𝐵 + 𝐶)))
79		addcl 11228	. . . . . . . . . . . . . . 15 ⊢ ((𝐴 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (𝐴 + 𝐶) ∈ ℂ)
80	79	ad2ant2r 745	. . . . . . . . . . . . . 14 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ)) → (𝐴 + 𝐶) ∈ ℂ)
81		addcl 11228	. . . . . . . . . . . . . . 15 ⊢ ((𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (𝐵 + 𝐶) ∈ ℂ)
82	81	ad2ant2lr 746	. . . . . . . . . . . . . 14 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ)) → (𝐵 + 𝐶) ∈ ℂ)
83	80, 82	jca 510	. . . . . . . . . . . . 13 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ)) → ((𝐴 + 𝐶) ∈ ℂ ∧ (𝐵 + 𝐶) ∈ ℂ))
84	83	3adant3 1129	. . . . . . . . . . . 12 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((𝐴 + 𝐶) ∈ ℂ ∧ (𝐵 + 𝐶) ∈ ℂ))
85		addcom 11438	. . . . . . . . . . . 12 ⊢ (((𝐴 + 𝐶) ∈ ℂ ∧ (𝐵 + 𝐶) ∈ ℂ) → ((𝐴 + 𝐶) + (𝐵 + 𝐶)) = ((𝐵 + 𝐶) + (𝐴 + 𝐶)))
86	84, 85	syl 17	. . . . . . . . . . 11 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((𝐴 + 𝐶) + (𝐵 + 𝐶)) = ((𝐵 + 𝐶) + (𝐴 + 𝐶)))
87	73, 78, 86	3eqtrd 2772	. . . . . . . . . 10 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((𝐴 + 𝐵) + ((𝐶 + 𝐷) + (𝐶 − 𝐷))) = ((𝐵 + 𝐶) + (𝐴 + 𝐶)))
88	64, 66, 87	3eqtr3rd 2777	. . . . . . . . 9 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((𝐵 + 𝐶) + (𝐴 + 𝐶)) = (π + (𝐶 − 𝐷)))
89		picn 26414	. . . . . . . . . . 11 ⊢ π ∈ ℂ
90		addcom 11438	. . . . . . . . . . 11 ⊢ ((π ∈ ℂ ∧ (𝐶 − 𝐷) ∈ ℂ) → (π + (𝐶 − 𝐷)) = ((𝐶 − 𝐷) + π))
91	89, 28, 90	sylancr 585	. . . . . . . . . 10 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ)) → (π + (𝐶 − 𝐷)) = ((𝐶 − 𝐷) + π))
92	91	3adant3 1129	. . . . . . . . 9 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (π + (𝐶 − 𝐷)) = ((𝐶 − 𝐷) + π))
93	88, 92	eqtrd 2768	. . . . . . . 8 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((𝐵 + 𝐶) + (𝐴 + 𝐶)) = ((𝐶 − 𝐷) + π))
94	93	fveq2d 6906	. . . . . . 7 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (cos‘((𝐵 + 𝐶) + (𝐴 + 𝐶))) = (cos‘((𝐶 − 𝐷) + π)))
95		cosppi 26445	. . . . . . . . 9 ⊢ ((𝐶 − 𝐷) ∈ ℂ → (cos‘((𝐶 − 𝐷) + π)) = -(cos‘(𝐶 − 𝐷)))
96	28, 95	syl 17	. . . . . . . 8 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ)) → (cos‘((𝐶 − 𝐷) + π)) = -(cos‘(𝐶 − 𝐷)))
97	96	3adant3 1129	. . . . . . 7 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (cos‘((𝐶 − 𝐷) + π)) = -(cos‘(𝐶 − 𝐷)))
98	94, 97	eqtrd 2768	. . . . . 6 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (cos‘((𝐵 + 𝐶) + (𝐴 + 𝐶))) = -(cos‘(𝐶 − 𝐷)))
99	59, 98	oveq12d 7444	. . . . 5 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((cos‘((𝐵 + 𝐶) − (𝐴 + 𝐶))) − (cos‘((𝐵 + 𝐶) + (𝐴 + 𝐶)))) = ((cos‘(𝐵 − 𝐴)) − -(cos‘(𝐶 − 𝐷))))
100		subcl 11497	. . . . . . . . . 10 ⊢ ((𝐵 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (𝐵 − 𝐴) ∈ ℂ)
101	100	ancoms 457	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐵 − 𝐴) ∈ ℂ)
102	101	adantr 479	. . . . . . . 8 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ)) → (𝐵 − 𝐴) ∈ ℂ)
103	102	coscld 16115	. . . . . . 7 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ)) → (cos‘(𝐵 − 𝐴)) ∈ ℂ)
104	103, 29	subnegd 11616	. . . . . 6 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ)) → ((cos‘(𝐵 − 𝐴)) − -(cos‘(𝐶 − 𝐷))) = ((cos‘(𝐵 − 𝐴)) + (cos‘(𝐶 − 𝐷))))
105	104	3adant3 1129	. . . . 5 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((cos‘(𝐵 − 𝐴)) − -(cos‘(𝐶 − 𝐷))) = ((cos‘(𝐵 − 𝐴)) + (cos‘(𝐶 − 𝐷))))
106	99, 105	eqtrd 2768	. . . 4 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((cos‘((𝐵 + 𝐶) − (𝐴 + 𝐶))) − (cos‘((𝐵 + 𝐶) + (𝐴 + 𝐶)))) = ((cos‘(𝐵 − 𝐴)) + (cos‘(𝐶 − 𝐷))))
107	106	oveq1d 7441	. . 3 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (((cos‘((𝐵 + 𝐶) − (𝐴 + 𝐶))) − (cos‘((𝐵 + 𝐶) + (𝐴 + 𝐶)))) / 2) = (((cos‘(𝐵 − 𝐴)) + (cos‘(𝐶 − 𝐷))) / 2))
108		sinmul 16156	. . . . 5 ⊢ (((𝐵 + 𝐶) ∈ ℂ ∧ (𝐴 + 𝐶) ∈ ℂ) → ((sin‘(𝐵 + 𝐶)) · (sin‘(𝐴 + 𝐶))) = (((cos‘((𝐵 + 𝐶) − (𝐴 + 𝐶))) − (cos‘((𝐵 + 𝐶) + (𝐴 + 𝐶)))) / 2))
109	82, 80, 108	syl2anc 582	. . . 4 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ)) → ((sin‘(𝐵 + 𝐶)) · (sin‘(𝐴 + 𝐶))) = (((cos‘((𝐵 + 𝐶) − (𝐴 + 𝐶))) − (cos‘((𝐵 + 𝐶) + (𝐴 + 𝐶)))) / 2))
110	109	3adant3 1129	. . 3 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((sin‘(𝐵 + 𝐶)) · (sin‘(𝐴 + 𝐶))) = (((cos‘((𝐵 + 𝐶) − (𝐴 + 𝐶))) − (cos‘((𝐵 + 𝐶) + (𝐴 + 𝐶)))) / 2))
111		cosneg 16131	. . . . . . . 8 ⊢ ((𝐴 − 𝐵) ∈ ℂ → (cos‘-(𝐴 − 𝐵)) = (cos‘(𝐴 − 𝐵)))
112	36, 111	syl 17	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (cos‘-(𝐴 − 𝐵)) = (cos‘(𝐴 − 𝐵)))
113		negsubdi2 11557	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → -(𝐴 − 𝐵) = (𝐵 − 𝐴))
114	113	fveq2d 6906	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (cos‘-(𝐴 − 𝐵)) = (cos‘(𝐵 − 𝐴)))
115	112, 114	eqtr3d 2770	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (cos‘(𝐴 − 𝐵)) = (cos‘(𝐵 − 𝐴)))
116	115	3ad2ant1 1130	. . . . 5 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (cos‘(𝐴 − 𝐵)) = (cos‘(𝐵 − 𝐴)))
117	116	oveq1d 7441	. . . 4 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((cos‘(𝐴 − 𝐵)) + (cos‘(𝐶 − 𝐷))) = ((cos‘(𝐵 − 𝐴)) + (cos‘(𝐶 − 𝐷))))
118	117	oveq1d 7441	. . 3 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (((cos‘(𝐴 − 𝐵)) + (cos‘(𝐶 − 𝐷))) / 2) = (((cos‘(𝐵 − 𝐴)) + (cos‘(𝐶 − 𝐷))) / 2))
119	107, 110, 118	3eqtr4d 2778	. 2 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → ((sin‘(𝐵 + 𝐶)) · (sin‘(𝐴 + 𝐶))) = (((cos‘(𝐴 − 𝐵)) + (cos‘(𝐶 − 𝐷))) / 2))
120	48, 53, 119	3eqtr4d 2778	1 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ ((𝐴 + 𝐵) + (𝐶 + 𝐷)) = π) → (((sin‘𝐴) · (sin‘𝐵)) + ((sin‘𝐶) · (sin‘𝐷))) = ((sin‘(𝐵 + 𝐶)) · (sin‘(𝐴 + 𝐶))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 394 ∧ w3a 1084 = wceq 1533 ∈ wcel 2098 ≠ wne 2937 ‘cfv 6553 (class class class)co 7426 ℂcc 11144 0cc0 11146 + caddc 11149 · cmul 11151 − cmin 11482 -cneg 11483 / cdiv 11909 2c2 12305 sincsin 16047 cosccos 16048 πcpi 16050

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 2166 ax-ext 2699 ax-rep 5289 ax-sep 5303 ax-nul 5310 ax-pow 5369 ax-pr 5433 ax-un 7746 ax-inf2 9672 ax-cnex 11202 ax-resscn 11203 ax-1cn 11204 ax-icn 11205 ax-addcl 11206 ax-addrcl 11207 ax-mulcl 11208 ax-mulrcl 11209 ax-mulcom 11210 ax-addass 11211 ax-mulass 11212 ax-distr 11213 ax-i2m1 11214 ax-1ne0 11215 ax-1rid 11216 ax-rnegex 11217 ax-rrecex 11218 ax-cnre 11219 ax-pre-lttri 11220 ax-pre-lttrn 11221 ax-pre-ltadd 11222 ax-pre-mulgt0 11223 ax-pre-sup 11224 ax-addf 11225

This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2529 df-eu 2558 df-clab 2706 df-cleq 2720 df-clel 2806 df-nfc 2881 df-ne 2938 df-nel 3044 df-ral 3059 df-rex 3068 df-rmo 3374 df-reu 3375 df-rab 3431 df-v 3475 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4327 df-if 4533 df-pw 4608 df-sn 4633 df-pr 4635 df-tp 4637 df-op 4639 df-uni 4913 df-int 4954 df-iun 5002 df-iin 5003 df-br 5153 df-opab 5215 df-mpt 5236 df-tr 5270 df-id 5580 df-eprel 5586 df-po 5594 df-so 5595 df-fr 5637 df-se 5638 df-we 5639 df-xp 5688 df-rel 5689 df-cnv 5690 df-co 5691 df-dm 5692 df-rn 5693 df-res 5694 df-ima 5695 df-pred 6310 df-ord 6377 df-on 6378 df-lim 6379 df-suc 6380 df-iota 6505 df-fun 6555 df-fn 6556 df-f 6557 df-f1 6558 df-fo 6559 df-f1o 6560 df-fv 6561 df-isom 6562 df-riota 7382 df-ov 7429 df-oprab 7430 df-mpo 7431 df-of 7691 df-om 7877 df-1st 7999 df-2nd 8000 df-supp 8172 df-frecs 8293 df-wrecs 8324 df-recs 8398 df-rdg 8437 df-1o 8493 df-2o 8494 df-er 8731 df-map 8853 df-pm 8854 df-ixp 8923 df-en 8971 df-dom 8972 df-sdom 8973 df-fin 8974 df-fsupp 9394 df-fi 9442 df-sup 9473 df-inf 9474 df-oi 9541 df-card 9970 df-pnf 11288 df-mnf 11289 df-xr 11290 df-ltxr 11291 df-le 11292 df-sub 11484 df-neg 11485 df-div 11910 df-nn 12251 df-2 12313 df-3 12314 df-4 12315 df-5 12316 df-6 12317 df-7 12318 df-8 12319 df-9 12320 df-n0 12511 df-z 12597 df-dec 12716 df-uz 12861 df-q 12971 df-rp 13015 df-xneg 13132 df-xadd 13133 df-xmul 13134 df-ioo 13368 df-ioc 13369 df-ico 13370 df-icc 13371 df-fz 13525 df-fzo 13668 df-fl 13797 df-seq 14007 df-exp 14067 df-fac 14273 df-bc 14302 df-hash 14330 df-shft 15054 df-cj 15086 df-re 15087 df-im 15088 df-sqrt 15222 df-abs 15223 df-limsup 15455 df-clim 15472 df-rlim 15473 df-sum 15673 df-ef 16051 df-sin 16053 df-cos 16054 df-pi 16056 df-struct 17123 df-sets 17140 df-slot 17158 df-ndx 17170 df-base 17188 df-ress 17217 df-plusg 17253 df-mulr 17254 df-starv 17255 df-sca 17256 df-vsca 17257 df-ip 17258 df-tset 17259 df-ple 17260 df-ds 17262 df-unif 17263 df-hom 17264 df-cco 17265 df-rest 17411 df-topn 17412 df-0g 17430 df-gsum 17431 df-topgen 17432 df-pt 17433 df-prds 17436 df-xrs 17491 df-qtop 17496 df-imas 17497 df-xps 17499 df-mre 17573 df-mrc 17574 df-acs 17576 df-mgm 18607 df-sgrp 18686 df-mnd 18702 df-submnd 18748 df-mulg 19031 df-cntz 19275 df-cmn 19744 df-psmet 21278 df-xmet 21279 df-met 21280 df-bl 21281 df-mopn 21282 df-fbas 21283 df-fg 21284 df-cnfld 21287 df-top 22816 df-topon 22833 df-topsp 22855 df-bases 22869 df-cld 22943 df-ntr 22944 df-cls 22945 df-nei 23022 df-lp 23060 df-perf 23061 df-cn 23151 df-cnp 23152 df-haus 23239 df-tx 23486 df-hmeo 23679 df-fil 23770 df-fm 23862 df-flim 23863 df-flf 23864 df-xms 24246 df-ms 24247 df-tms 24248 df-cncf 24818 df-limc 25815 df-dv 25816

This theorem is referenced by: (None)

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