f(sinx)=cos2x+1 =1-2sin^2 x+1 =2-2sin^2 x f(cosx)=2-2cos^2 x =2(1-cos^2 x) =2sin^2 x 很高兴为您解答,【the1900】团队为您答题. 请点击下面的【选为满意回答】按钮,
