sinq12ge0 - Metamath Proof Explorer

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Theorem sinq12ge0 26539

Description: The sine of a number between 0 and π is nonnegative. (Contributed by Mario Carneiro, 13-May-2014.)

**Assertion**
Ref	Expression
sinq12ge0	⊢ (𝐴 ∈ (0[,]π) → 0 ≤ (sin‘𝐴))

**Proof of Theorem sinq12ge0**
Step	Hyp	Ref	Expression
1		0re 11268	. . . . . . . 8 ⊢ 0 ∈ ℝ
2		pire 26489	. . . . . . . 8 ⊢ π ∈ ℝ
3	1, 2	elicc2i 13446	. . . . . . 7 ⊢ (𝐴 ∈ (0[,]π) ↔ (𝐴 ∈ ℝ ∧ 0 ≤ 𝐴 ∧ 𝐴 ≤ π))
4	3	simp1bi 1142	. . . . . 6 ⊢ (𝐴 ∈ (0[,]π) → 𝐴 ∈ ℝ)
5		rexr 11312	. . . . . . . . . 10 ⊢ (0 ∈ ℝ → 0 ∈ ℝ^*)
6		rexr 11312	. . . . . . . . . 10 ⊢ (π ∈ ℝ → π ∈ ℝ^*)
7		elioo2 13421	. . . . . . . . . 10 ⊢ ((0 ∈ ℝ^* ∧ π ∈ ℝ^*) → (𝐴 ∈ (0(,)π) ↔ (𝐴 ∈ ℝ ∧ 0 < 𝐴 ∧ 𝐴 < π)))
8	5, 6, 7	syl2an 594	. . . . . . . . 9 ⊢ ((0 ∈ ℝ ∧ π ∈ ℝ) → (𝐴 ∈ (0(,)π) ↔ (𝐴 ∈ ℝ ∧ 0 < 𝐴 ∧ 𝐴 < π)))
9	1, 2, 8	mp2an 690	. . . . . . . 8 ⊢ (𝐴 ∈ (0(,)π) ↔ (𝐴 ∈ ℝ ∧ 0 < 𝐴 ∧ 𝐴 < π))
10		sinq12gt0 26538	. . . . . . . 8 ⊢ (𝐴 ∈ (0(,)π) → 0 < (sin‘𝐴))
11	9, 10	sylbir 234	. . . . . . 7 ⊢ ((𝐴 ∈ ℝ ∧ 0 < 𝐴 ∧ 𝐴 < π) → 0 < (sin‘𝐴))
12	11	3expib 1119	. . . . . 6 ⊢ (𝐴 ∈ ℝ → ((0 < 𝐴 ∧ 𝐴 < π) → 0 < (sin‘𝐴)))
13	4, 12	syl 17	. . . . 5 ⊢ (𝐴 ∈ (0[,]π) → ((0 < 𝐴 ∧ 𝐴 < π) → 0 < (sin‘𝐴)))
14	4	resincld 16147	. . . . . 6 ⊢ (𝐴 ∈ (0[,]π) → (sin‘𝐴) ∈ ℝ)
15		ltle 11354	. . . . . 6 ⊢ ((0 ∈ ℝ ∧ (sin‘𝐴) ∈ ℝ) → (0 < (sin‘𝐴) → 0 ≤ (sin‘𝐴)))
16	1, 14, 15	sylancr 585	. . . . 5 ⊢ (𝐴 ∈ (0[,]π) → (0 < (sin‘𝐴) → 0 ≤ (sin‘𝐴)))
17	13, 16	syld 47	. . . 4 ⊢ (𝐴 ∈ (0[,]π) → ((0 < 𝐴 ∧ 𝐴 < π) → 0 ≤ (sin‘𝐴)))
18	17	expd 414	. . 3 ⊢ (𝐴 ∈ (0[,]π) → (0 < 𝐴 → (𝐴 < π → 0 ≤ (sin‘𝐴))))
19		0le0 12367	. . . . . 6 ⊢ 0 ≤ 0
20		sin0 16153	. . . . . 6 ⊢ (sin‘0) = 0
21	19, 20	breqtrri 5182	. . . . 5 ⊢ 0 ≤ (sin‘0)
22		fveq2 6903	. . . . 5 ⊢ (0 = 𝐴 → (sin‘0) = (sin‘𝐴))
23	21, 22	breqtrid 5192	. . . 4 ⊢ (0 = 𝐴 → 0 ≤ (sin‘𝐴))
24	23	a1i13 27	. . 3 ⊢ (𝐴 ∈ (0[,]π) → (0 = 𝐴 → (𝐴 < π → 0 ≤ (sin‘𝐴))))
25	3	simp2bi 1143	. . . 4 ⊢ (𝐴 ∈ (0[,]π) → 0 ≤ 𝐴)
26		leloe 11352	. . . . 5 ⊢ ((0 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (0 ≤ 𝐴 ↔ (0 < 𝐴 ∨ 0 = 𝐴)))
27	1, 4, 26	sylancr 585	. . . 4 ⊢ (𝐴 ∈ (0[,]π) → (0 ≤ 𝐴 ↔ (0 < 𝐴 ∨ 0 = 𝐴)))
28	25, 27	mpbid 231	. . 3 ⊢ (𝐴 ∈ (0[,]π) → (0 < 𝐴 ∨ 0 = 𝐴))
29	18, 24, 28	mpjaod 858	. 2 ⊢ (𝐴 ∈ (0[,]π) → (𝐴 < π → 0 ≤ (sin‘𝐴)))
30		sinpi 26488	. . . . 5 ⊢ (sin‘π) = 0
31	19, 30	breqtrri 5182	. . . 4 ⊢ 0 ≤ (sin‘π)
32		fveq2 6903	. . . 4 ⊢ (𝐴 = π → (sin‘𝐴) = (sin‘π))
33	31, 32	breqtrrid 5193	. . 3 ⊢ (𝐴 = π → 0 ≤ (sin‘𝐴))
34	33	a1i 11	. 2 ⊢ (𝐴 ∈ (0[,]π) → (𝐴 = π → 0 ≤ (sin‘𝐴)))
35	3	simp3bi 1144	. . 3 ⊢ (𝐴 ∈ (0[,]π) → 𝐴 ≤ π)
36		leloe 11352	. . . 4 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ) → (𝐴 ≤ π ↔ (𝐴 < π ∨ 𝐴 = π)))
37	4, 2, 36	sylancl 584	. . 3 ⊢ (𝐴 ∈ (0[,]π) → (𝐴 ≤ π ↔ (𝐴 < π ∨ 𝐴 = π)))
38	35, 37	mpbid 231	. 2 ⊢ (𝐴 ∈ (0[,]π) → (𝐴 < π ∨ 𝐴 = π))
39	29, 34, 38	mpjaod 858	1 ⊢ (𝐴 ∈ (0[,]π) → 0 ≤ (sin‘𝐴))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 394 ∨ wo 845 ∧ w3a 1084 = wceq 1534 ∈ wcel 2099 class class class wbr 5155 ‘cfv 6556 (class class class)co 7426 ℝcr 11159 0cc0 11160 ℝ^*cxr 11299 < clt 11300 ≤ cle 11301 (,)cioo 13380 [,]cicc 13383 sincsin 16067 πcpi 16070

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1906 ax-6 1964 ax-7 2004 ax-8 2101 ax-9 2109 ax-10 2130 ax-11 2147 ax-12 2167 ax-ext 2697 ax-rep 5292 ax-sep 5306 ax-nul 5313 ax-pow 5371 ax-pr 5435 ax-un 7748 ax-inf2 9686 ax-cnex 11216 ax-resscn 11217 ax-1cn 11218 ax-icn 11219 ax-addcl 11220 ax-addrcl 11221 ax-mulcl 11222 ax-mulrcl 11223 ax-mulcom 11224 ax-addass 11225 ax-mulass 11226 ax-distr 11227 ax-i2m1 11228 ax-1ne0 11229 ax-1rid 11230 ax-rnegex 11231 ax-rrecex 11232 ax-cnre 11233 ax-pre-lttri 11234 ax-pre-lttrn 11235 ax-pre-ltadd 11236 ax-pre-mulgt0 11237 ax-pre-sup 11238 ax-addf 11239

This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1537 df-fal 1547 df-ex 1775 df-nf 1779 df-sb 2061 df-mo 2529 df-eu 2558 df-clab 2704 df-cleq 2718 df-clel 2803 df-nfc 2878 df-ne 2931 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3364 df-reu 3365 df-rab 3420 df-v 3464 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3967 df-nul 4326 df-if 4534 df-pw 4609 df-sn 4634 df-pr 4636 df-tp 4638 df-op 4640 df-uni 4916 df-int 4957 df-iun 5005 df-iin 5006 df-br 5156 df-opab 5218 df-mpt 5239 df-tr 5273 df-id 5582 df-eprel 5588 df-po 5596 df-so 5597 df-fr 5639 df-se 5640 df-we 5641 df-xp 5690 df-rel 5691 df-cnv 5692 df-co 5693 df-dm 5694 df-rn 5695 df-res 5696 df-ima 5697 df-pred 6314 df-ord 6381 df-on 6382 df-lim 6383 df-suc 6384 df-iota 6508 df-fun 6558 df-fn 6559 df-f 6560 df-f1 6561 df-fo 6562 df-f1o 6563 df-fv 6564 df-isom 6565 df-riota 7382 df-ov 7429 df-oprab 7430 df-mpo 7431 df-of 7692 df-om 7879 df-1st 8005 df-2nd 8006 df-supp 8177 df-frecs 8298 df-wrecs 8329 df-recs 8403 df-rdg 8442 df-1o 8498 df-2o 8499 df-er 8736 df-map 8859 df-pm 8860 df-ixp 8929 df-en 8977 df-dom 8978 df-sdom 8979 df-fin 8980 df-fsupp 9408 df-fi 9456 df-sup 9487 df-inf 9488 df-oi 9555 df-card 9984 df-pnf 11302 df-mnf 11303 df-xr 11304 df-ltxr 11305 df-le 11306 df-sub 11498 df-neg 11499 df-div 11924 df-nn 12267 df-2 12329 df-3 12330 df-4 12331 df-5 12332 df-6 12333 df-7 12334 df-8 12335 df-9 12336 df-n0 12527 df-z 12613 df-dec 12732 df-uz 12877 df-q 12987 df-rp 13031 df-xneg 13148 df-xadd 13149 df-xmul 13150 df-ioo 13384 df-ioc 13385 df-ico 13386 df-icc 13387 df-fz 13541 df-fzo 13684 df-fl 13814 df-seq 14024 df-exp 14084 df-fac 14293 df-bc 14322 df-hash 14350 df-shft 15074 df-cj 15106 df-re 15107 df-im 15108 df-sqrt 15242 df-abs 15243 df-limsup 15475 df-clim 15492 df-rlim 15493 df-sum 15693 df-ef 16071 df-sin 16073 df-cos 16074 df-pi 16076 df-struct 17151 df-sets 17168 df-slot 17186 df-ndx 17198 df-base 17216 df-ress 17245 df-plusg 17281 df-mulr 17282 df-starv 17283 df-sca 17284 df-vsca 17285 df-ip 17286 df-tset 17287 df-ple 17288 df-ds 17290 df-unif 17291 df-hom 17292 df-cco 17293 df-rest 17439 df-topn 17440 df-0g 17458 df-gsum 17459 df-topgen 17460 df-pt 17461 df-prds 17464 df-xrs 17519 df-qtop 17524 df-imas 17525 df-xps 17527 df-mre 17601 df-mrc 17602 df-acs 17604 df-mgm 18635 df-sgrp 18714 df-mnd 18730 df-submnd 18776 df-mulg 19064 df-cntz 19313 df-cmn 19782 df-psmet 21337 df-xmet 21338 df-met 21339 df-bl 21340 df-mopn 21341 df-fbas 21342 df-fg 21343 df-cnfld 21346 df-top 22890 df-topon 22907 df-topsp 22929 df-bases 22943 df-cld 23017 df-ntr 23018 df-cls 23019 df-nei 23096 df-lp 23134 df-perf 23135 df-cn 23225 df-cnp 23226 df-haus 23313 df-tx 23560 df-hmeo 23753 df-fil 23844 df-fm 23936 df-flim 23937 df-flf 23938 df-xms 24320 df-ms 24321 df-tms 24322 df-cncf 24892 df-limc 25889 df-dv 25890

This theorem is referenced by: cosq14ge0 26542 argimgt0 26642 sin2h 37313

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