自主园地备考套餐加固训练练透考点1sincostan()A0B.C1 D解析:原式sincostansincostan10.答案:A2.()Asin2cos2 Bsin2cos2C(sin2cos2) Dcos2sin2解析:|sin2cos2|sin2cos2.答案:A3已知为锐角,且2tan()3cos50,tan()6sin()1,则sin的值是()A.B.C.D.解析:由已知可得2tan3sin50,tan6sin1,解得tan3,又sin2cos21,为锐角故sin.答案:C42022安徽设函数f(x)(xR)满足f(x)f(x)sinx.当0x时,f(x)0,则f()A. B. C0 D解析:ffsinfsinsinfsinsinsin2sinsin.答案:A52022大纲全国设asin33,bcos55,ctan35,则()Aabc BbcaCcba Dcab解析:asin33,bcos55sin35,ctan35,sin35sin33.cba,选C.答案:C