sinq12ge0 - Metamath Proof Explorer

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Theorem sinq12ge0 25096

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 10645	. . . . . . . 8 ⊢ 0 ∈ ℝ
2		pire 25046	. . . . . . . 8 ⊢ π ∈ ℝ
3	1, 2	elicc2i 12805	. . . . . . 7 ⊢ (𝐴 ∈ (0[,]π) ↔ (𝐴 ∈ ℝ ∧ 0 ≤ 𝐴 ∧ 𝐴 ≤ π))
4	3	simp1bi 1141	. . . . . 6 ⊢ (𝐴 ∈ (0[,]π) → 𝐴 ∈ ℝ)
5		rexr 10689	. . . . . . . . . 10 ⊢ (0 ∈ ℝ → 0 ∈ ℝ^*)
6		rexr 10689	. . . . . . . . . 10 ⊢ (π ∈ ℝ → π ∈ ℝ^*)
7		elioo2 12782	. . . . . . . . . 10 ⊢ ((0 ∈ ℝ^* ∧ π ∈ ℝ^*) → (𝐴 ∈ (0(,)π) ↔ (𝐴 ∈ ℝ ∧ 0 < 𝐴 ∧ 𝐴 < π)))
8	5, 6, 7	syl2an 597	. . . . . . . . 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 25095	. . . . . . . 8 ⊢ (𝐴 ∈ (0(,)π) → 0 < (sin‘𝐴))
11	9, 10	sylbir 237	. . . . . . 7 ⊢ ((𝐴 ∈ ℝ ∧ 0 < 𝐴 ∧ 𝐴 < π) → 0 < (sin‘𝐴))
12	11	3expib 1118	. . . . . 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 15498	. . . . . 6 ⊢ (𝐴 ∈ (0[,]π) → (sin‘𝐴) ∈ ℝ)
15		ltle 10731	. . . . . 6 ⊢ ((0 ∈ ℝ ∧ (sin‘𝐴) ∈ ℝ) → (0 < (sin‘𝐴) → 0 ≤ (sin‘𝐴)))
16	1, 14, 15	sylancr 589	. . . . 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 418	. . 3 ⊢ (𝐴 ∈ (0[,]π) → (0 < 𝐴 → (𝐴 < π → 0 ≤ (sin‘𝐴))))
19		0le0 11741	. . . . . 6 ⊢ 0 ≤ 0
20		sin0 15504	. . . . . 6 ⊢ (sin‘0) = 0
21	19, 20	breqtrri 5095	. . . . 5 ⊢ 0 ≤ (sin‘0)
22		fveq2 6672	. . . . 5 ⊢ (0 = 𝐴 → (sin‘0) = (sin‘𝐴))
23	21, 22	breqtrid 5105	. . . 4 ⊢ (0 = 𝐴 → 0 ≤ (sin‘𝐴))
24	23	a1i13 27	. . 3 ⊢ (𝐴 ∈ (0[,]π) → (0 = 𝐴 → (𝐴 < π → 0 ≤ (sin‘𝐴))))
25	3	simp2bi 1142	. . . 4 ⊢ (𝐴 ∈ (0[,]π) → 0 ≤ 𝐴)
26		leloe 10729	. . . . 5 ⊢ ((0 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (0 ≤ 𝐴 ↔ (0 < 𝐴 ∨ 0 = 𝐴)))
27	1, 4, 26	sylancr 589	. . . 4 ⊢ (𝐴 ∈ (0[,]π) → (0 ≤ 𝐴 ↔ (0 < 𝐴 ∨ 0 = 𝐴)))
28	25, 27	mpbid 234	. . 3 ⊢ (𝐴 ∈ (0[,]π) → (0 < 𝐴 ∨ 0 = 𝐴))
29	18, 24, 28	mpjaod 856	. 2 ⊢ (𝐴 ∈ (0[,]π) → (𝐴 < π → 0 ≤ (sin‘𝐴)))
30		sinpi 25045	. . . . 5 ⊢ (sin‘π) = 0
31	19, 30	breqtrri 5095	. . . 4 ⊢ 0 ≤ (sin‘π)
32		fveq2 6672	. . . 4 ⊢ (𝐴 = π → (sin‘𝐴) = (sin‘π))
33	31, 32	breqtrrid 5106	. . 3 ⊢ (𝐴 = π → 0 ≤ (sin‘𝐴))
34	33	a1i 11	. 2 ⊢ (𝐴 ∈ (0[,]π) → (𝐴 = π → 0 ≤ (sin‘𝐴)))
35	3	simp3bi 1143	. . 3 ⊢ (𝐴 ∈ (0[,]π) → 𝐴 ≤ π)
36		leloe 10729	. . . 4 ⊢ ((𝐴 ∈ ℝ ∧ π ∈ ℝ) → (𝐴 ≤ π ↔ (𝐴 < π ∨ 𝐴 = π)))
37	4, 2, 36	sylancl 588	. . 3 ⊢ (𝐴 ∈ (0[,]π) → (𝐴 ≤ π ↔ (𝐴 < π ∨ 𝐴 = π)))
38	35, 37	mpbid 234	. 2 ⊢ (𝐴 ∈ (0[,]π) → (𝐴 < π ∨ 𝐴 = π))
39	29, 34, 38	mpjaod 856	1 ⊢ (𝐴 ∈ (0[,]π) → 0 ≤ (sin‘𝐴))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 ∨ wo 843 ∧ w3a 1083 = wceq 1537 ∈ wcel 2114 class class class wbr 5068 ‘cfv 6357 (class class class)co 7158 ℝcr 10538 0cc0 10539 ℝ^*cxr 10676 < clt 10677 ≤ cle 10678 (,)cioo 12741 [,]cicc 12744 sincsin 15419 πcpi 15422

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 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-rep 5192 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 ax-inf2 9106 ax-cnex 10595 ax-resscn 10596 ax-1cn 10597 ax-icn 10598 ax-addcl 10599 ax-addrcl 10600 ax-mulcl 10601 ax-mulrcl 10602 ax-mulcom 10603 ax-addass 10604 ax-mulass 10605 ax-distr 10606 ax-i2m1 10607 ax-1ne0 10608 ax-1rid 10609 ax-rnegex 10610 ax-rrecex 10611 ax-cnre 10612 ax-pre-lttri 10613 ax-pre-lttrn 10614 ax-pre-ltadd 10615 ax-pre-mulgt0 10616 ax-pre-sup 10617 ax-addf 10618 ax-mulf 10619

This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-fal 1550 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-nel 3126 df-ral 3145 df-rex 3146 df-reu 3147 df-rmo 3148 df-rab 3149 df-v 3498 df-sbc 3775 df-csb 3886 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-pss 3956 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-tp 4574 df-op 4576 df-uni 4841 df-int 4879 df-iun 4923 df-iin 4924 df-br 5069 df-opab 5131 df-mpt 5149 df-tr 5175 df-id 5462 df-eprel 5467 df-po 5476 df-so 5477 df-fr 5516 df-se 5517 df-we 5518 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-pred 6150 df-ord 6196 df-on 6197 df-lim 6198 df-suc 6199 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-f1 6362 df-fo 6363 df-f1o 6364 df-fv 6365 df-isom 6366 df-riota 7116 df-ov 7161 df-oprab 7162 df-mpo 7163 df-of 7411 df-om 7583 df-1st 7691 df-2nd 7692 df-supp 7833 df-wrecs 7949 df-recs 8010 df-rdg 8048 df-1o 8104 df-2o 8105 df-oadd 8108 df-er 8291 df-map 8410 df-pm 8411 df-ixp 8464 df-en 8512 df-dom 8513 df-sdom 8514 df-fin 8515 df-fsupp 8836 df-fi 8877 df-sup 8908 df-inf 8909 df-oi 8976 df-card 9370 df-pnf 10679 df-mnf 10680 df-xr 10681 df-ltxr 10682 df-le 10683 df-sub 10874 df-neg 10875 df-div 11300 df-nn 11641 df-2 11703 df-3 11704 df-4 11705 df-5 11706 df-6 11707 df-7 11708 df-8 11709 df-9 11710 df-n0 11901 df-z 11985 df-dec 12102 df-uz 12247 df-q 12352 df-rp 12393 df-xneg 12510 df-xadd 12511 df-xmul 12512 df-ioo 12745 df-ioc 12746 df-ico 12747 df-icc 12748 df-fz 12896 df-fzo 13037 df-fl 13165 df-seq 13373 df-exp 13433 df-fac 13637 df-bc 13666 df-hash 13694 df-shft 14428 df-cj 14460 df-re 14461 df-im 14462 df-sqrt 14596 df-abs 14597 df-limsup 14830 df-clim 14847 df-rlim 14848 df-sum 15045 df-ef 15423 df-sin 15425 df-cos 15426 df-pi 15428 df-struct 16487 df-ndx 16488 df-slot 16489 df-base 16491 df-sets 16492 df-ress 16493 df-plusg 16580 df-mulr 16581 df-starv 16582 df-sca 16583 df-vsca 16584 df-ip 16585 df-tset 16586 df-ple 16587 df-ds 16589 df-unif 16590 df-hom 16591 df-cco 16592 df-rest 16698 df-topn 16699 df-0g 16717 df-gsum 16718 df-topgen 16719 df-pt 16720 df-prds 16723 df-xrs 16777 df-qtop 16782 df-imas 16783 df-xps 16785 df-mre 16859 df-mrc 16860 df-acs 16862 df-mgm 17854 df-sgrp 17903 df-mnd 17914 df-submnd 17959 df-mulg 18227 df-cntz 18449 df-cmn 18910 df-psmet 20539 df-xmet 20540 df-met 20541 df-bl 20542 df-mopn 20543 df-fbas 20544 df-fg 20545 df-cnfld 20548 df-top 21504 df-topon 21521 df-topsp 21543 df-bases 21556 df-cld 21629 df-ntr 21630 df-cls 21631 df-nei 21708 df-lp 21746 df-perf 21747 df-cn 21837 df-cnp 21838 df-haus 21925 df-tx 22172 df-hmeo 22365 df-fil 22456 df-fm 22548 df-flim 22549 df-flf 22550 df-xms 22932 df-ms 22933 df-tms 22934 df-cncf 23488 df-limc 24466 df-dv 24467

This theorem is referenced by: cosq14ge0 25099 argimgt0 25197 sin2h 34884

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