>>402
そこまで求まってたら部分積分だろ

∫(sin(x)+x*cos(x))log(x)dx
= x*sin(x)*log(x) - ∫x*sin(x)*(1/x)dx
= x*sin(x)*log(x) - ∫sin(x)dx
= x*sin(x)*log(x) + cos(x) + C