答:
(sinxcosx)^2的原函数
=∫ (sinxcosx)^2 dx
=(1/4)∫ (sin2x)^2 dx
=(1/8)∫ 2(sin2x)^2 dx
=(1/8) ∫ 1-cos4x dx
=x/8 -(1/32)*sin(4x)+C