计算：∫sin 5xsin 7xdx．

(24)int sin 5xsin 7xdx -

int xsin xdx=（ ）A.B.C.D.

int (sin )^3x(cos )^5xdx= __ A.int (sin )^3x(cos )^5xdx= __ B.int (sin )

计算(int )_(-1)^1sqrt [3]({x)^2}(sin )^5xdx计算

4.计算不定积分int xsin^2xdx4.计算不定积分$\int x\sin^{2}xdx$

14.主观题（10分）计算int xsin xdx。14.主观题（10分）计算$\int x\sin xdx$。

A int cos xdx=sin x+CB int cos xdx=sin x+CC int cos xdx=sin x+CD int cos xdx=sin

计算定积分 int_(0)^pi sin xdx= ( )A. 1B. -1C. 2D. -2

(int )_(0)^dfrac (pi {2)}xsin xdx= ()-|||-

[题目]计算: (int )_(-2)^2sin 2xdx= __