sin2h - Mathbox for Brendan Leahy

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Theorem sin2h 36466

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 11212	. . . . . 6 ⊢ 0 ∈ ℝ
2		2re 12282	. . . . . . 7 ⊢ 2 ∈ ℝ
3		pire 25959	. . . . . . 7 ⊢ π ∈ ℝ
4	2, 3	remulcli 11226	. . . . . 6 ⊢ (2 · π) ∈ ℝ
5		iccssre 13402	. . . . . 6 ⊢ ((0 ∈ ℝ ∧ (2 · π) ∈ ℝ) → (0[,](2 · π)) ⊆ ℝ)
6	1, 4, 5	mp2an 690	. . . . 5 ⊢ (0[,](2 · π)) ⊆ ℝ
7	6	sseli 3977	. . . 4 ⊢ (𝐴 ∈ (0[,](2 · π)) → 𝐴 ∈ ℝ)
8	7	rehalfcld 12455	. . 3 ⊢ (𝐴 ∈ (0[,](2 · π)) → (𝐴 / 2) ∈ ℝ)
9	8	resincld 16082	. 2 ⊢ (𝐴 ∈ (0[,](2 · π)) → (sin‘(𝐴 / 2)) ∈ ℝ)
10		1re 11210	. . . . . 6 ⊢ 1 ∈ ℝ
11		recoscl 16080	. . . . . 6 ⊢ (𝐴 ∈ ℝ → (cos‘𝐴) ∈ ℝ)
12		resubcl 11520	. . . . . 6 ⊢ ((1 ∈ ℝ ∧ (cos‘𝐴) ∈ ℝ) → (1 − (cos‘𝐴)) ∈ ℝ)
13	10, 11, 12	sylancr 587	. . . . 5 ⊢ (𝐴 ∈ ℝ → (1 − (cos‘𝐴)) ∈ ℝ)
14	13	rehalfcld 12455	. . . 4 ⊢ (𝐴 ∈ ℝ → ((1 − (cos‘𝐴)) / 2) ∈ ℝ)
15		cosbnd 16120	. . . . . 6 ⊢ (𝐴 ∈ ℝ → (-1 ≤ (cos‘𝐴) ∧ (cos‘𝐴) ≤ 1))
16	15	simprd 496	. . . . 5 ⊢ (𝐴 ∈ ℝ → (cos‘𝐴) ≤ 1)
17		subge0 11723	. . . . . . 7 ⊢ ((1 ∈ ℝ ∧ (cos‘𝐴) ∈ ℝ) → (0 ≤ (1 − (cos‘𝐴)) ↔ (cos‘𝐴) ≤ 1))
18	10, 11, 17	sylancr 587	. . . . . 6 ⊢ (𝐴 ∈ ℝ → (0 ≤ (1 − (cos‘𝐴)) ↔ (cos‘𝐴) ≤ 1))
19		halfnneg2 12439	. . . . . . 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 280	. . . . 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 15360	. . 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 13386	. . . 4 ⊢ (𝐴 ∈ (0[,](2 · π)) ↔ (𝐴 ∈ ℝ ∧ 0 ≤ 𝐴 ∧ 𝐴 ≤ (2 · π)))
26		halfnneg2 12439	. . . . . . . 8 ⊢ (𝐴 ∈ ℝ → (0 ≤ 𝐴 ↔ 0 ≤ (𝐴 / 2)))
27		2pos 12311	. . . . . . . . . . 11 ⊢ 0 < 2
28	2, 27	pm3.2i 471	. . . . . . . . . 10 ⊢ (2 ∈ ℝ ∧ 0 < 2)
29		ledivmul 12086	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ ∧ (2 ∈ ℝ ∧ 0 < 2)) → ((𝐴 / 2) ≤ π ↔ 𝐴 ≤ (2 · π)))
30	3, 28, 29	mp3an23 1453	. . . . . . . . 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 631	. . . . . . 7 ⊢ (𝐴 ∈ ℝ → ((0 ≤ 𝐴 ∧ 𝐴 ≤ (2 · π)) ↔ (0 ≤ (𝐴 / 2) ∧ (𝐴 / 2) ≤ π)))
33		rehalfcl 12434	. . . . . . . . 9 ⊢ (𝐴 ∈ ℝ → (𝐴 / 2) ∈ ℝ)
34	33	rexrd 11260	. . . . . . . 8 ⊢ (𝐴 ∈ ℝ → (𝐴 / 2) ∈ ℝ^*)
35		0xr 11257	. . . . . . . . 9 ⊢ 0 ∈ ℝ^*
36	3	rexri 11268	. . . . . . . . 9 ⊢ π ∈ ℝ^*
37		elicc4 13387	. . . . . . . . 9 ⊢ ((0 ∈ ℝ^* ∧ π ∈ ℝ^* ∧ (𝐴 / 2) ∈ ℝ^*) → ((𝐴 / 2) ∈ (0[,]π) ↔ (0 ≤ (𝐴 / 2) ∧ (𝐴 / 2) ≤ π)))
38	35, 36, 37	mp3an12 1451	. . . . . . . 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 281	. . . . . 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 1116	. . . 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 26009	. . 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 15363	. . 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 11238	. . 3 ⊢ (𝐴 ∈ (0[,](2 · π)) → 𝐴 ∈ ℂ)
49		ax-1cn 11164	. . . . . . 7 ⊢ 1 ∈ ℂ
50		coscl 16066	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → (cos‘𝐴) ∈ ℂ)
51		subcl 11455	. . . . . . 7 ⊢ ((1 ∈ ℂ ∧ (cos‘𝐴) ∈ ℂ) → (1 − (cos‘𝐴)) ∈ ℂ)
52	49, 50, 51	sylancr 587	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (1 − (cos‘𝐴)) ∈ ℂ)
53	52	halfcld 12453	. . . . 5 ⊢ (𝐴 ∈ ℂ → ((1 − (cos‘𝐴)) / 2) ∈ ℂ)
54	53	sqsqrtd 15382	. . . 4 ⊢ (𝐴 ∈ ℂ → ((√‘((1 − (cos‘𝐴)) / 2))↑2) = ((1 − (cos‘𝐴)) / 2))
55		halfcl 12433	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → (𝐴 / 2) ∈ ℂ)
56		coscl 16066	. . . . . . . . . . . . 13 ⊢ ((𝐴 / 2) ∈ ℂ → (cos‘(𝐴 / 2)) ∈ ℂ)
57	56	sqcld 14105	. . . . . . . . . . . 12 ⊢ ((𝐴 / 2) ∈ ℂ → ((cos‘(𝐴 / 2))↑2) ∈ ℂ)
58		2cn 12283	. . . . . . . . . . . 12 ⊢ 2 ∈ ℂ
59		mulcom 11192	. . . . . . . . . . . 12 ⊢ ((((cos‘(𝐴 / 2))↑2) ∈ ℂ ∧ 2 ∈ ℂ) → (((cos‘(𝐴 / 2))↑2) · 2) = (2 · ((cos‘(𝐴 / 2))↑2)))
60	57, 58, 59	sylancl 586	. . . . . . . . . . 11 ⊢ ((𝐴 / 2) ∈ ℂ → (((cos‘(𝐴 / 2))↑2) · 2) = (2 · ((cos‘(𝐴 / 2))↑2)))
61	60	oveq2d 7421	. . . . . . . . . 10 ⊢ ((𝐴 / 2) ∈ ℂ → ((1 · 2) − (((cos‘(𝐴 / 2))↑2) · 2)) = ((1 · 2) − (2 · ((cos‘(𝐴 / 2))↑2))))
62	58	mullidi 11215	. . . . . . . . . . . 12 ⊢ (1 · 2) = 2
63		df-2 12271	. . . . . . . . . . . 12 ⊢ 2 = (1 + 1)
64	62, 63	eqtri 2760	. . . . . . . . . . 11 ⊢ (1 · 2) = (1 + 1)
65	64	oveq1i 7415	. . . . . . . . . 10 ⊢ ((1 · 2) − (2 · ((cos‘(𝐴 / 2))↑2))) = ((1 + 1) − (2 · ((cos‘(𝐴 / 2))↑2)))
66	61, 65	eqtrdi 2788	. . . . . . . . 9 ⊢ ((𝐴 / 2) ∈ ℂ → ((1 · 2) − (((cos‘(𝐴 / 2))↑2) · 2)) = ((1 + 1) − (2 · ((cos‘(𝐴 / 2))↑2))))
67		subdir 11644	. . . . . . . . . . 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 1452	. . . . . . . . . 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 11190	. . . . . . . . . . 11 ⊢ ((2 ∈ ℂ ∧ ((cos‘(𝐴 / 2))↑2) ∈ ℂ) → (2 · ((cos‘(𝐴 / 2))↑2)) ∈ ℂ)
71	58, 57, 70	sylancr 587	. . . . . . . . . 10 ⊢ ((𝐴 / 2) ∈ ℂ → (2 · ((cos‘(𝐴 / 2))↑2)) ∈ ℂ)
72		subsub3 11488	. . . . . . . . . . 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 1452	. . . . . . . . . 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 2782	. . . . . . . 8 ⊢ ((𝐴 / 2) ∈ ℂ → ((1 − ((cos‘(𝐴 / 2))↑2)) · 2) = (1 − ((2 · ((cos‘(𝐴 / 2))↑2)) − 1)))
76		sincl 16065	. . . . . . . . . . . 12 ⊢ ((𝐴 / 2) ∈ ℂ → (sin‘(𝐴 / 2)) ∈ ℂ)
77	76	sqcld 14105	. . . . . . . . . . 11 ⊢ ((𝐴 / 2) ∈ ℂ → ((sin‘(𝐴 / 2))↑2) ∈ ℂ)
78	77, 57	pncand 11568	. . . . . . . . . 10 ⊢ ((𝐴 / 2) ∈ ℂ → ((((sin‘(𝐴 / 2))↑2) + ((cos‘(𝐴 / 2))↑2)) − ((cos‘(𝐴 / 2))↑2)) = ((sin‘(𝐴 / 2))↑2))
79		sincossq 16115	. . . . . . . . . . 11 ⊢ ((𝐴 / 2) ∈ ℂ → (((sin‘(𝐴 / 2))↑2) + ((cos‘(𝐴 / 2))↑2)) = 1)
80	79	oveq1d 7420	. . . . . . . . . 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 2774	. . . . . . . . 9 ⊢ ((𝐴 / 2) ∈ ℂ → ((sin‘(𝐴 / 2))↑2) = (1 − ((cos‘(𝐴 / 2))↑2)))
82	81	oveq1d 7420	. . . . . . . 8 ⊢ ((𝐴 / 2) ∈ ℂ → (((sin‘(𝐴 / 2))↑2) · 2) = ((1 − ((cos‘(𝐴 / 2))↑2)) · 2))
83		cos2t 16117	. . . . . . . . 9 ⊢ ((𝐴 / 2) ∈ ℂ → (cos‘(2 · (𝐴 / 2))) = ((2 · ((cos‘(𝐴 / 2))↑2)) − 1))
84	83	oveq2d 7421	. . . . . . . 8 ⊢ ((𝐴 / 2) ∈ ℂ → (1 − (cos‘(2 · (𝐴 / 2)))) = (1 − ((2 · ((cos‘(𝐴 / 2))↑2)) − 1)))
85	75, 82, 84	3eqtr4d 2782	. . . . . . 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 12312	. . . . . . . . 9 ⊢ 2 ≠ 0
88		divcan2 11876	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 2 ∈ ℂ ∧ 2 ≠ 0) → (2 · (𝐴 / 2)) = 𝐴)
89	58, 87, 88	mp3an23 1453	. . . . . . . 8 ⊢ (𝐴 ∈ ℂ → (2 · (𝐴 / 2)) = 𝐴)
90	89	fveq2d 6892	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → (cos‘(2 · (𝐴 / 2))) = (cos‘𝐴))
91	90	oveq2d 7421	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (1 − (cos‘(2 · (𝐴 / 2)))) = (1 − (cos‘𝐴)))
92	86, 91	eqtrd 2772	. . . . 5 ⊢ (𝐴 ∈ ℂ → (((sin‘(𝐴 / 2))↑2) · 2) = (1 − (cos‘𝐴)))
93	92	oveq1d 7420	. . . 4 ⊢ (𝐴 ∈ ℂ → ((((sin‘(𝐴 / 2))↑2) · 2) / 2) = ((1 − (cos‘𝐴)) / 2))
94	55	sincld 16069	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (sin‘(𝐴 / 2)) ∈ ℂ)
95	94	sqcld 14105	. . . . 5 ⊢ (𝐴 ∈ ℂ → ((sin‘(𝐴 / 2))↑2) ∈ ℂ)
96		divcan4 11895	. . . . . 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 1453	. . . . 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 2779	. . 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 14217	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 396 ∧ w3a 1087 = wceq 1541 ∈ wcel 2106 ≠ wne 2940 ⊆ wss 3947 class class class wbr 5147 ‘cfv 6540 (class class class)co 7405 ℂcc 11104 ℝcr 11105 0cc0 11106 1c1 11107 + caddc 11109 · cmul 11111 ℝ^*cxr 11243 < clt 11244 ≤ cle 11245 − cmin 11440 -cneg 11441 / cdiv 11867 2c2 12263 [,]cicc 13323 ↑cexp 14023 √csqrt 15176 sincsin 16003 cosccos 16004 πcpi 16006

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 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7721 ax-inf2 9632 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183 ax-pre-sup 11184 ax-addf 11185 ax-mulf 11186

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 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-tp 4632 df-op 4634 df-uni 4908 df-int 4950 df-iun 4998 df-iin 4999 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-se 5631 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6297 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-isom 6549 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-of 7666 df-om 7852 df-1st 7971 df-2nd 7972 df-supp 8143 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-1o 8462 df-2o 8463 df-er 8699 df-map 8818 df-pm 8819 df-ixp 8888 df-en 8936 df-dom 8937 df-sdom 8938 df-fin 8939 df-fsupp 9358 df-fi 9402 df-sup 9433 df-inf 9434 df-oi 9501 df-card 9930 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11442 df-neg 11443 df-div 11868 df-nn 12209 df-2 12271 df-3 12272 df-4 12273 df-5 12274 df-6 12275 df-7 12276 df-8 12277 df-9 12278 df-n0 12469 df-z 12555 df-dec 12674 df-uz 12819 df-q 12929 df-rp 12971 df-xneg 13088 df-xadd 13089 df-xmul 13090 df-ioo 13324 df-ioc 13325 df-ico 13326 df-icc 13327 df-fz 13481 df-fzo 13624 df-fl 13753 df-seq 13963 df-exp 14024 df-fac 14230 df-bc 14259 df-hash 14287 df-shft 15010 df-cj 15042 df-re 15043 df-im 15044 df-sqrt 15178 df-abs 15179 df-limsup 15411 df-clim 15428 df-rlim 15429 df-sum 15629 df-ef 16007 df-sin 16009 df-cos 16010 df-pi 16012 df-struct 17076 df-sets 17093 df-slot 17111 df-ndx 17123 df-base 17141 df-ress 17170 df-plusg 17206 df-mulr 17207 df-starv 17208 df-sca 17209 df-vsca 17210 df-ip 17211 df-tset 17212 df-ple 17213 df-ds 17215 df-unif 17216 df-hom 17217 df-cco 17218 df-rest 17364 df-topn 17365 df-0g 17383 df-gsum 17384 df-topgen 17385 df-pt 17386 df-prds 17389 df-xrs 17444 df-qtop 17449 df-imas 17450 df-xps 17452 df-mre 17526 df-mrc 17527 df-acs 17529 df-mgm 18557 df-sgrp 18606 df-mnd 18622 df-submnd 18668 df-mulg 18945 df-cntz 19175 df-cmn 19644 df-psmet 20928 df-xmet 20929 df-met 20930 df-bl 20931 df-mopn 20932 df-fbas 20933 df-fg 20934 df-cnfld 20937 df-top 22387 df-topon 22404 df-topsp 22426 df-bases 22440 df-cld 22514 df-ntr 22515 df-cls 22516 df-nei 22593 df-lp 22631 df-perf 22632 df-cn 22722 df-cnp 22723 df-haus 22810 df-tx 23057 df-hmeo 23250 df-fil 23341 df-fm 23433 df-flim 23434 df-flf 23435 df-xms 23817 df-ms 23818 df-tms 23819 df-cncf 24385 df-limc 25374 df-dv 25375

This theorem is referenced by: tan2h 36468

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