Question

sin^2cos^2化简

这道题改怎么化简啊？？？才人帮忙解一下~谢谢、、、、

Answer 1

sin^2cos^2=(cos2a+1)/2*(1-cos2a)/2=1-cos2a^2/4=sin2a^2/4

Answer 2

sin^2cos^2=Cos[x]^2 - Cos[x]^4=1/8 (1-cos(4 x))

Answer 3

sin(2x)=2sinx*cosx
所以原式等于（sin（2x））2/4

Answer 4

sin^2acos^2a=1/4[sin2a]^2