计算:∫sin 5xsin 7xdx.计算:∫sin5xsin7xdx.
int xsin xdx=( )A.B.C.D.
int (sin )^3x(cos )^5xdx= __ A.int (sin )^3x(cos )^5xdx= __ B.int (sin )
A int cos xdx=sin x+CB int cos xdx=sin x+CC int cos xdx=sin x+CD int cos xdx=sin
(int )_(0)^dfrac (pi {2)}xsin xdx= ()-|||-
定积分(int )_(0)^dfrac (pi {2)}(e)^xsin xdx的值是(int )_(0)^dfrac (pi {2)}(e)^xsin xdx
5.设 _(1)=(int )_(0)^1xdx , _(2)=(int )_(0)^1sin xdx , _(3)=(int )_(0)^1tan xdx,
求 int (sin )^4xdx
简答题(10.0分)8.int xsin xdx简答题(10.0分)8.$\int x\sin xdx$
.(int )_(e)^x(sin )^2xdx.