[题目]计算: (int )_(-2)^2sin 2xdx= __

(9) int xtan^2xdx;(9) $\int x\tan^{2}xdx;$

[题目]若-|||-=(int )_(0)^2(x)^2dx =(int )_(0)^2(x)^3dx, =(int )_(0)^2sin xdx, 则a,b,

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

(15)int (x)^3(ln )^2xdx;

(int )_(0)^+infty (x)^3(e)^-2xdx= __

15) int tan^10xcdotsec^2xdx;15) $\int \tan^{10}x\cdot\sec^{2}xdx;$

24.[填空题]int_(-1)^1x^2sin xdx=____24.[填空题]$\int_{-1}^{1}x^{2}\sin xdx=$____

cos 2x(e)^-x+ sin 2x(e)^-xdx-|||-B.cos2xe^(-x)- sin 2x(e)^-xdx-|||-. cos 2x(e)^

(5) int (tan )^10xcdot (sec )^2xdx;

定积分 (int )_(1)^2xdx=(x)^2+C ( ) ○正确 ○错误定积分( )○正确 ○错误