∫sin^2(x)cos^2(x)dx
问题描述:
∫sin^2(x)cos^2(x)dx
对于三角函数来说,形如∫sin^n(x)cos^m(x)有没有通解?
答
原式=(1/2)∫(sin2x)^2dx
=(1/4)∫(1+cos4x)dx
=(1/4)(x+sin4x/4)+C
=x/4+sin4x/16+C