4)y=sin^2 x
5)y=cos^2 4x
6)y=2x+sin^3 2x

4)y`=2sinxcosx=sin2x5)y`=2cos4x *(-sin4x)*4=-8sin4xcos4x=-4sin8x6)y`=2+3sin²2x*cos2x*2=2+6sin²2xcos2x=2+3sin2xsin4x