化简sin^4x+sin^2xcos^2x+cos^2x=?(请写过程)
问题描述：
化简sin^4x+sin^2xcos^2x+cos^2x=?(请写过程)
答
sin^4x表示(sinx)^4还是(sin4x)^2??
答
x就不写了,原式等于
sin^2(sin^2+cos^2)+cos^2 = sin^2*(1)+cos^2 = sin^2+cos^2 = 1