求积分∫x(sinx)^2dx

求积分∫x(sinx)^2dx
求积分∫x(sinx)^2dx

求积分∫x(sinx)^2dx
分部积分法
∫x(sinx)^2dx=sin(x)^2/4 - (x*sin(2*x))/4 + x^2/4