sin2h - Mathbox for Brendan Leahy

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Theorem sin2h 36478

Description: Half-angle rule for sine. (Contributed by Brendan Leahy, 3-Aug-2018.)

**Assertion**
Ref	Expression
sin2h	⊢ (𝐴 ∈ (0[,](2 · π)) → (sin‘(𝐴 / 2)) = (√‘((1 − (cos‘𝐴)) / 2)))

**Proof of Theorem sin2h**
Step	Hyp	Ref	Expression
1		0re 11216	. . . . . 6 ⊢ 0 ∈ ℝ
2		2re 12286	. . . . . . 7 ⊢ 2 ∈ ℝ
3		pire 25968	. . . . . . 7 ⊢ π ∈ ℝ
4	2, 3	remulcli 11230	. . . . . 6 ⊢ (2 · π) ∈ ℝ
5		iccssre 13406	. . . . . 6 ⊢ ((0 ∈ ℝ ∧ (2 · π) ∈ ℝ) → (0[,](2 · π)) ⊆ ℝ)
6	1, 4, 5	mp2an 691	. . . . 5 ⊢ (0[,](2 · π)) ⊆ ℝ
7	6	sseli 3979	. . . 4 ⊢ (𝐴 ∈ (0[,](2 · π)) → 𝐴 ∈ ℝ)
8	7	rehalfcld 12459	. . 3 ⊢ (𝐴 ∈ (0[,](2 · π)) → (𝐴 / 2) ∈ ℝ)
9	8	resincld 16086	. 2 ⊢ (𝐴 ∈ (0[,](2 · π)) → (sin‘(𝐴 / 2)) ∈ ℝ)
10		1re 11214	. . . . . 6 ⊢ 1 ∈ ℝ
11		recoscl 16084	. . . . . 6 ⊢ (𝐴 ∈ ℝ → (cos‘𝐴) ∈ ℝ)
12		resubcl 11524	. . . . . 6 ⊢ ((1 ∈ ℝ ∧ (cos‘𝐴) ∈ ℝ) → (1 − (cos‘𝐴)) ∈ ℝ)
13	10, 11, 12	sylancr 588	. . . . 5 ⊢ (𝐴 ∈ ℝ → (1 − (cos‘𝐴)) ∈ ℝ)
14	13	rehalfcld 12459	. . . 4 ⊢ (𝐴 ∈ ℝ → ((1 − (cos‘𝐴)) / 2) ∈ ℝ)
15		cosbnd 16124	. . . . . 6 ⊢ (𝐴 ∈ ℝ → (-1 ≤ (cos‘𝐴) ∧ (cos‘𝐴) ≤ 1))
16	15	simprd 497	. . . . 5 ⊢ (𝐴 ∈ ℝ → (cos‘𝐴) ≤ 1)
17		subge0 11727	. . . . . . 7 ⊢ ((1 ∈ ℝ ∧ (cos‘𝐴) ∈ ℝ) → (0 ≤ (1 − (cos‘𝐴)) ↔ (cos‘𝐴) ≤ 1))
18	10, 11, 17	sylancr 588	. . . . . 6 ⊢ (𝐴 ∈ ℝ → (0 ≤ (1 − (cos‘𝐴)) ↔ (cos‘𝐴) ≤ 1))
19		halfnneg2 12443	. . . . . . 7 ⊢ ((1 − (cos‘𝐴)) ∈ ℝ → (0 ≤ (1 − (cos‘𝐴)) ↔ 0 ≤ ((1 − (cos‘𝐴)) / 2)))
20	13, 19	syl 17	. . . . . 6 ⊢ (𝐴 ∈ ℝ → (0 ≤ (1 − (cos‘𝐴)) ↔ 0 ≤ ((1 − (cos‘𝐴)) / 2)))
21	18, 20	bitr3d 281	. . . . 5 ⊢ (𝐴 ∈ ℝ → ((cos‘𝐴) ≤ 1 ↔ 0 ≤ ((1 − (cos‘𝐴)) / 2)))
22	16, 21	mpbid 231	. . . 4 ⊢ (𝐴 ∈ ℝ → 0 ≤ ((1 − (cos‘𝐴)) / 2))
23	14, 22	resqrtcld 15364	. . 3 ⊢ (𝐴 ∈ ℝ → (√‘((1 − (cos‘𝐴)) / 2)) ∈ ℝ)
24	7, 23	syl 17	. 2 ⊢ (𝐴 ∈ (0[,](2 · π)) → (√‘((1 − (cos‘𝐴)) / 2)) ∈ ℝ)
25	1, 4	elicc2i 13390	. . . 4 ⊢ (𝐴 ∈ (0[,](2 · π)) ↔ (𝐴 ∈ ℝ ∧ 0 ≤ 𝐴 ∧ 𝐴 ≤ (2 · π)))
26		halfnneg2 12443	. . . . . . . 8 ⊢ (𝐴 ∈ ℝ → (0 ≤ 𝐴 ↔ 0 ≤ (𝐴 / 2)))
27		2pos 12315	. . . . . . . . . . 11 ⊢ 0 < 2
28	2, 27	pm3.2i 472	. . . . . . . . . 10 ⊢ (2 ∈ ℝ ∧ 0 < 2)
29		ledivmul 12090	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ ∧ (2 ∈ ℝ ∧ 0 < 2)) → ((𝐴 / 2) ≤ π ↔ 𝐴 ≤ (2 · π)))
30	3, 28, 29	mp3an23 1454	. . . . . . . . 9 ⊢ (𝐴 ∈ ℝ → ((𝐴 / 2) ≤ π ↔ 𝐴 ≤ (2 · π)))
31	30	bicomd 222	. . . . . . . 8 ⊢ (𝐴 ∈ ℝ → (𝐴 ≤ (2 · π) ↔ (𝐴 / 2) ≤ π))
32	26, 31	anbi12d 632	. . . . . . 7 ⊢ (𝐴 ∈ ℝ → ((0 ≤ 𝐴 ∧ 𝐴 ≤ (2 · π)) ↔ (0 ≤ (𝐴 / 2) ∧ (𝐴 / 2) ≤ π)))
33		rehalfcl 12438	. . . . . . . . 9 ⊢ (𝐴 ∈ ℝ → (𝐴 / 2) ∈ ℝ)
34	33	rexrd 11264	. . . . . . . 8 ⊢ (𝐴 ∈ ℝ → (𝐴 / 2) ∈ ℝ^*)
35		0xr 11261	. . . . . . . . 9 ⊢ 0 ∈ ℝ^*
36	3	rexri 11272	. . . . . . . . 9 ⊢ π ∈ ℝ^*
37		elicc4 13391	. . . . . . . . 9 ⊢ ((0 ∈ ℝ^* ∧ π ∈ ℝ^* ∧ (𝐴 / 2) ∈ ℝ^*) → ((𝐴 / 2) ∈ (0[,]π) ↔ (0 ≤ (𝐴 / 2) ∧ (𝐴 / 2) ≤ π)))
38	35, 36, 37	mp3an12 1452	. . . . . . . 8 ⊢ ((𝐴 / 2) ∈ ℝ^* → ((𝐴 / 2) ∈ (0[,]π) ↔ (0 ≤ (𝐴 / 2) ∧ (𝐴 / 2) ≤ π)))
39	34, 38	syl 17	. . . . . . 7 ⊢ (𝐴 ∈ ℝ → ((𝐴 / 2) ∈ (0[,]π) ↔ (0 ≤ (𝐴 / 2) ∧ (𝐴 / 2) ≤ π)))
40	32, 39	bitr4d 282	. . . . . 6 ⊢ (𝐴 ∈ ℝ → ((0 ≤ 𝐴 ∧ 𝐴 ≤ (2 · π)) ↔ (𝐴 / 2) ∈ (0[,]π)))
41	40	biimpd 228	. . . . 5 ⊢ (𝐴 ∈ ℝ → ((0 ≤ 𝐴 ∧ 𝐴 ≤ (2 · π)) → (𝐴 / 2) ∈ (0[,]π)))
42	41	3impib 1117	. . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 0 ≤ 𝐴 ∧ 𝐴 ≤ (2 · π)) → (𝐴 / 2) ∈ (0[,]π))
43	25, 42	sylbi 216	. . 3 ⊢ (𝐴 ∈ (0[,](2 · π)) → (𝐴 / 2) ∈ (0[,]π))
44		sinq12ge0 26018	. . 3 ⊢ ((𝐴 / 2) ∈ (0[,]π) → 0 ≤ (sin‘(𝐴 / 2)))
45	43, 44	syl 17	. 2 ⊢ (𝐴 ∈ (0[,](2 · π)) → 0 ≤ (sin‘(𝐴 / 2)))
46	14, 22	sqrtge0d 15367	. . 3 ⊢ (𝐴 ∈ ℝ → 0 ≤ (√‘((1 − (cos‘𝐴)) / 2)))
47	7, 46	syl 17	. 2 ⊢ (𝐴 ∈ (0[,](2 · π)) → 0 ≤ (√‘((1 − (cos‘𝐴)) / 2)))
48	7	recnd 11242	. . 3 ⊢ (𝐴 ∈ (0[,](2 · π)) → 𝐴 ∈ ℂ)
49		ax-1cn 11168	. . . . . . 7 ⊢ 1 ∈ ℂ
50		coscl 16070	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → (cos‘𝐴) ∈ ℂ)
51		subcl 11459	. . . . . . 7 ⊢ ((1 ∈ ℂ ∧ (cos‘𝐴) ∈ ℂ) → (1 − (cos‘𝐴)) ∈ ℂ)
52	49, 50, 51	sylancr 588	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (1 − (cos‘𝐴)) ∈ ℂ)
53	52	halfcld 12457	. . . . 5 ⊢ (𝐴 ∈ ℂ → ((1 − (cos‘𝐴)) / 2) ∈ ℂ)
54	53	sqsqrtd 15386	. . . 4 ⊢ (𝐴 ∈ ℂ → ((√‘((1 − (cos‘𝐴)) / 2))↑2) = ((1 − (cos‘𝐴)) / 2))
55		halfcl 12437	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → (𝐴 / 2) ∈ ℂ)
56		coscl 16070	. . . . . . . . . . . . 13 ⊢ ((𝐴 / 2) ∈ ℂ → (cos‘(𝐴 / 2)) ∈ ℂ)
57	56	sqcld 14109	. . . . . . . . . . . 12 ⊢ ((𝐴 / 2) ∈ ℂ → ((cos‘(𝐴 / 2))↑2) ∈ ℂ)
58		2cn 12287	. . . . . . . . . . . 12 ⊢ 2 ∈ ℂ
59		mulcom 11196	. . . . . . . . . . . 12 ⊢ ((((cos‘(𝐴 / 2))↑2) ∈ ℂ ∧ 2 ∈ ℂ) → (((cos‘(𝐴 / 2))↑2) · 2) = (2 · ((cos‘(𝐴 / 2))↑2)))
60	57, 58, 59	sylancl 587	. . . . . . . . . . 11 ⊢ ((𝐴 / 2) ∈ ℂ → (((cos‘(𝐴 / 2))↑2) · 2) = (2 · ((cos‘(𝐴 / 2))↑2)))
61	60	oveq2d 7425	. . . . . . . . . 10 ⊢ ((𝐴 / 2) ∈ ℂ → ((1 · 2) − (((cos‘(𝐴 / 2))↑2) · 2)) = ((1 · 2) − (2 · ((cos‘(𝐴 / 2))↑2))))
62	58	mullidi 11219	. . . . . . . . . . . 12 ⊢ (1 · 2) = 2
63		df-2 12275	. . . . . . . . . . . 12 ⊢ 2 = (1 + 1)
64	62, 63	eqtri 2761	. . . . . . . . . . 11 ⊢ (1 · 2) = (1 + 1)
65	64	oveq1i 7419	. . . . . . . . . 10 ⊢ ((1 · 2) − (2 · ((cos‘(𝐴 / 2))↑2))) = ((1 + 1) − (2 · ((cos‘(𝐴 / 2))↑2)))
66	61, 65	eqtrdi 2789	. . . . . . . . 9 ⊢ ((𝐴 / 2) ∈ ℂ → ((1 · 2) − (((cos‘(𝐴 / 2))↑2) · 2)) = ((1 + 1) − (2 · ((cos‘(𝐴 / 2))↑2))))
67		subdir 11648	. . . . . . . . . . 11 ⊢ ((1 ∈ ℂ ∧ ((cos‘(𝐴 / 2))↑2) ∈ ℂ ∧ 2 ∈ ℂ) → ((1 − ((cos‘(𝐴 / 2))↑2)) · 2) = ((1 · 2) − (((cos‘(𝐴 / 2))↑2) · 2)))
68	49, 58, 67	mp3an13 1453	. . . . . . . . . 10 ⊢ (((cos‘(𝐴 / 2))↑2) ∈ ℂ → ((1 − ((cos‘(𝐴 / 2))↑2)) · 2) = ((1 · 2) − (((cos‘(𝐴 / 2))↑2) · 2)))
69	57, 68	syl 17	. . . . . . . . 9 ⊢ ((𝐴 / 2) ∈ ℂ → ((1 − ((cos‘(𝐴 / 2))↑2)) · 2) = ((1 · 2) − (((cos‘(𝐴 / 2))↑2) · 2)))
70		mulcl 11194	. . . . . . . . . . 11 ⊢ ((2 ∈ ℂ ∧ ((cos‘(𝐴 / 2))↑2) ∈ ℂ) → (2 · ((cos‘(𝐴 / 2))↑2)) ∈ ℂ)
71	58, 57, 70	sylancr 588	. . . . . . . . . 10 ⊢ ((𝐴 / 2) ∈ ℂ → (2 · ((cos‘(𝐴 / 2))↑2)) ∈ ℂ)
72		subsub3 11492	. . . . . . . . . . 11 ⊢ ((1 ∈ ℂ ∧ (2 · ((cos‘(𝐴 / 2))↑2)) ∈ ℂ ∧ 1 ∈ ℂ) → (1 − ((2 · ((cos‘(𝐴 / 2))↑2)) − 1)) = ((1 + 1) − (2 · ((cos‘(𝐴 / 2))↑2))))
73	49, 49, 72	mp3an13 1453	. . . . . . . . . 10 ⊢ ((2 · ((cos‘(𝐴 / 2))↑2)) ∈ ℂ → (1 − ((2 · ((cos‘(𝐴 / 2))↑2)) − 1)) = ((1 + 1) − (2 · ((cos‘(𝐴 / 2))↑2))))
74	71, 73	syl 17	. . . . . . . . 9 ⊢ ((𝐴 / 2) ∈ ℂ → (1 − ((2 · ((cos‘(𝐴 / 2))↑2)) − 1)) = ((1 + 1) − (2 · ((cos‘(𝐴 / 2))↑2))))
75	66, 69, 74	3eqtr4d 2783	. . . . . . . 8 ⊢ ((𝐴 / 2) ∈ ℂ → ((1 − ((cos‘(𝐴 / 2))↑2)) · 2) = (1 − ((2 · ((cos‘(𝐴 / 2))↑2)) − 1)))
76		sincl 16069	. . . . . . . . . . . 12 ⊢ ((𝐴 / 2) ∈ ℂ → (sin‘(𝐴 / 2)) ∈ ℂ)
77	76	sqcld 14109	. . . . . . . . . . 11 ⊢ ((𝐴 / 2) ∈ ℂ → ((sin‘(𝐴 / 2))↑2) ∈ ℂ)
78	77, 57	pncand 11572	. . . . . . . . . 10 ⊢ ((𝐴 / 2) ∈ ℂ → ((((sin‘(𝐴 / 2))↑2) + ((cos‘(𝐴 / 2))↑2)) − ((cos‘(𝐴 / 2))↑2)) = ((sin‘(𝐴 / 2))↑2))
79		sincossq 16119	. . . . . . . . . . 11 ⊢ ((𝐴 / 2) ∈ ℂ → (((sin‘(𝐴 / 2))↑2) + ((cos‘(𝐴 / 2))↑2)) = 1)
80	79	oveq1d 7424	. . . . . . . . . 10 ⊢ ((𝐴 / 2) ∈ ℂ → ((((sin‘(𝐴 / 2))↑2) + ((cos‘(𝐴 / 2))↑2)) − ((cos‘(𝐴 / 2))↑2)) = (1 − ((cos‘(𝐴 / 2))↑2)))
81	78, 80	eqtr3d 2775	. . . . . . . . 9 ⊢ ((𝐴 / 2) ∈ ℂ → ((sin‘(𝐴 / 2))↑2) = (1 − ((cos‘(𝐴 / 2))↑2)))
82	81	oveq1d 7424	. . . . . . . 8 ⊢ ((𝐴 / 2) ∈ ℂ → (((sin‘(𝐴 / 2))↑2) · 2) = ((1 − ((cos‘(𝐴 / 2))↑2)) · 2))
83		cos2t 16121	. . . . . . . . 9 ⊢ ((𝐴 / 2) ∈ ℂ → (cos‘(2 · (𝐴 / 2))) = ((2 · ((cos‘(𝐴 / 2))↑2)) − 1))
84	83	oveq2d 7425	. . . . . . . 8 ⊢ ((𝐴 / 2) ∈ ℂ → (1 − (cos‘(2 · (𝐴 / 2)))) = (1 − ((2 · ((cos‘(𝐴 / 2))↑2)) − 1)))
85	75, 82, 84	3eqtr4d 2783	. . . . . . 7 ⊢ ((𝐴 / 2) ∈ ℂ → (((sin‘(𝐴 / 2))↑2) · 2) = (1 − (cos‘(2 · (𝐴 / 2)))))
86	55, 85	syl 17	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (((sin‘(𝐴 / 2))↑2) · 2) = (1 − (cos‘(2 · (𝐴 / 2)))))
87		2ne0 12316	. . . . . . . . 9 ⊢ 2 ≠ 0
88		divcan2 11880	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 2 ∈ ℂ ∧ 2 ≠ 0) → (2 · (𝐴 / 2)) = 𝐴)
89	58, 87, 88	mp3an23 1454	. . . . . . . 8 ⊢ (𝐴 ∈ ℂ → (2 · (𝐴 / 2)) = 𝐴)
90	89	fveq2d 6896	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → (cos‘(2 · (𝐴 / 2))) = (cos‘𝐴))
91	90	oveq2d 7425	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (1 − (cos‘(2 · (𝐴 / 2)))) = (1 − (cos‘𝐴)))
92	86, 91	eqtrd 2773	. . . . 5 ⊢ (𝐴 ∈ ℂ → (((sin‘(𝐴 / 2))↑2) · 2) = (1 − (cos‘𝐴)))
93	92	oveq1d 7424	. . . 4 ⊢ (𝐴 ∈ ℂ → ((((sin‘(𝐴 / 2))↑2) · 2) / 2) = ((1 − (cos‘𝐴)) / 2))
94	55	sincld 16073	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (sin‘(𝐴 / 2)) ∈ ℂ)
95	94	sqcld 14109	. . . . 5 ⊢ (𝐴 ∈ ℂ → ((sin‘(𝐴 / 2))↑2) ∈ ℂ)
96		divcan4 11899	. . . . . 6 ⊢ ((((sin‘(𝐴 / 2))↑2) ∈ ℂ ∧ 2 ∈ ℂ ∧ 2 ≠ 0) → ((((sin‘(𝐴 / 2))↑2) · 2) / 2) = ((sin‘(𝐴 / 2))↑2))
97	58, 87, 96	mp3an23 1454	. . . . 5 ⊢ (((sin‘(𝐴 / 2))↑2) ∈ ℂ → ((((sin‘(𝐴 / 2))↑2) · 2) / 2) = ((sin‘(𝐴 / 2))↑2))
98	95, 97	syl 17	. . . 4 ⊢ (𝐴 ∈ ℂ → ((((sin‘(𝐴 / 2))↑2) · 2) / 2) = ((sin‘(𝐴 / 2))↑2))
99	54, 93, 98	3eqtr2rd 2780	. . 3 ⊢ (𝐴 ∈ ℂ → ((sin‘(𝐴 / 2))↑2) = ((√‘((1 − (cos‘𝐴)) / 2))↑2))
100	48, 99	syl 17	. 2 ⊢ (𝐴 ∈ (0[,](2 · π)) → ((sin‘(𝐴 / 2))↑2) = ((√‘((1 − (cos‘𝐴)) / 2))↑2))
101	9, 24, 45, 47, 100	sq11d 14221	1 ⊢ (𝐴 ∈ (0[,](2 · π)) → (sin‘(𝐴 / 2)) = (√‘((1 − (cos‘𝐴)) / 2)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 397 ∧ w3a 1088 = wceq 1542 ∈ wcel 2107 ≠ wne 2941 ⊆ wss 3949 class class class wbr 5149 ‘cfv 6544 (class class class)co 7409 ℂcc 11108 ℝcr 11109 0cc0 11110 1c1 11111 + caddc 11113 · cmul 11115 ℝ^*cxr 11247 < clt 11248 ≤ cle 11249 − cmin 11444 -cneg 11445 / cdiv 11871 2c2 12267 [,]cicc 13327 ↑cexp 14027 √csqrt 15180 sincsin 16007 cosccos 16008 πcpi 16010

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5286 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-inf2 9636 ax-cnex 11166 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187 ax-pre-sup 11188 ax-addf 11189 ax-mulf 11190

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3377 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-tp 4634 df-op 4636 df-uni 4910 df-int 4952 df-iun 5000 df-iin 5001 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-se 5633 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-isom 6553 df-riota 7365 df-ov 7412 df-oprab 7413 df-mpo 7414 df-of 7670 df-om 7856 df-1st 7975 df-2nd 7976 df-supp 8147 df-frecs 8266 df-wrecs 8297 df-recs 8371 df-rdg 8410 df-1o 8466 df-2o 8467 df-er 8703 df-map 8822 df-pm 8823 df-ixp 8892 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-fsupp 9362 df-fi 9406 df-sup 9437 df-inf 9438 df-oi 9505 df-card 9934 df-pnf 11250 df-mnf 11251 df-xr 11252 df-ltxr 11253 df-le 11254 df-sub 11446 df-neg 11447 df-div 11872 df-nn 12213 df-2 12275 df-3 12276 df-4 12277 df-5 12278 df-6 12279 df-7 12280 df-8 12281 df-9 12282 df-n0 12473 df-z 12559 df-dec 12678 df-uz 12823 df-q 12933 df-rp 12975 df-xneg 13092 df-xadd 13093 df-xmul 13094 df-ioo 13328 df-ioc 13329 df-ico 13330 df-icc 13331 df-fz 13485 df-fzo 13628 df-fl 13757 df-seq 13967 df-exp 14028 df-fac 14234 df-bc 14263 df-hash 14291 df-shft 15014 df-cj 15046 df-re 15047 df-im 15048 df-sqrt 15182 df-abs 15183 df-limsup 15415 df-clim 15432 df-rlim 15433 df-sum 15633 df-ef 16011 df-sin 16013 df-cos 16014 df-pi 16016 df-struct 17080 df-sets 17097 df-slot 17115 df-ndx 17127 df-base 17145 df-ress 17174 df-plusg 17210 df-mulr 17211 df-starv 17212 df-sca 17213 df-vsca 17214 df-ip 17215 df-tset 17216 df-ple 17217 df-ds 17219 df-unif 17220 df-hom 17221 df-cco 17222 df-rest 17368 df-topn 17369 df-0g 17387 df-gsum 17388 df-topgen 17389 df-pt 17390 df-prds 17393 df-xrs 17448 df-qtop 17453 df-imas 17454 df-xps 17456 df-mre 17530 df-mrc 17531 df-acs 17533 df-mgm 18561 df-sgrp 18610 df-mnd 18626 df-submnd 18672 df-mulg 18951 df-cntz 19181 df-cmn 19650 df-psmet 20936 df-xmet 20937 df-met 20938 df-bl 20939 df-mopn 20940 df-fbas 20941 df-fg 20942 df-cnfld 20945 df-top 22396 df-topon 22413 df-topsp 22435 df-bases 22449 df-cld 22523 df-ntr 22524 df-cls 22525 df-nei 22602 df-lp 22640 df-perf 22641 df-cn 22731 df-cnp 22732 df-haus 22819 df-tx 23066 df-hmeo 23259 df-fil 23350 df-fm 23442 df-flim 23443 df-flf 23444 df-xms 23826 df-ms 23827 df-tms 23828 df-cncf 24394 df-limc 25383 df-dv 25384

This theorem is referenced by: tan2h 36480

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