函数cos(mx)^2的原函数是什么,怎么算如题!更正...是cos^2mx

网友回答

(cosmx)^2=(1+cos2mx)/2
∫(cosmx)^2dx=1/2∫(1+cos2mx)dx
=1/2x+1/2∫(1/2m)cos2mxd2mx
=1/2x+1/4m∫cos2mxd2mx
=1/2x+(1/4m)sin2mx