∫cos^2(wt加 φ)sin(wt 加φ)dt
问题描述：
∫cos^2(wt加 φ)sin(wt 加φ)dt
答
∫cos^2(wt+φ)sin(wt +φ)dt
=∫-cos^2(wt+φ)/wdcos(wt +φ)
=-cos^3(wt+φ)/(3w)+C