7.计算下列定积分:-|||-(1) (int )_(0)^1x(e)^-xdx ;-|||-(2)(int )_(1)^xxln xdx;-|||-(3) (int )_(0)^dfrac (2pi {w)}tsin wtdt (w为常数);-|||-(4)(int )_(dfrac {pi )(4)}^dfrac (pi {3)}dfrac (x)({sin )^2x}dx;-|||-(5) (int )_(1)^4dfrac (ln x)(sqrt {x)}dx :-|||-(6) (int )_(0)^1xarctan xdx;-|||-(7) (int )_(0)^dfrac (pi {2)}(e)^2xcos xdx =-|||-(8)|xlog2xdx;-|||-(9) (int )_(0)^pi ((xsin x))^2dx ;-|||-(10)|sin(ln x)dx;-|||-(11) (int )_(dfrac {1)(x)}^c|ln x|dx ,-|||-(12) (int )_(0)^1((1-{x)^2)}^dfrac (m{2)}dx(min (N)_(+)) ;-|||-(13) _(m)=(int )_(0)^pi x(sin )^mxdx(min (N)_(+)) .

定积分(int )_(0)^dfrac (pi {2)}(e)^xsin xdx的值是(int )_(0)^dfrac (pi {2)}(e)^xsin xdx

计算下列定积分。-|||-(int )_(0)^1x(e)^-dfrac ({x^2)(2)}dx

9.计算下列积分:-|||-(1) (int )_(0)^2pi dfrac (1)(5+3sin theta )dtheta ;-|||-(2) (int

(int )_(0)^1x(e)^xdx= __

1.计算下列定积分:-|||-(1) (int )_(dfrac {pi )(3)}^pi sin (x+dfrac (pi )(3))dx ;-|||-(2)

2.计算下列定积分:-|||-(1) (int )_(dfrac {pi )(3)}^pi sin (x+dfrac (pi )(3))dx;-|||-(2)

定积分(int )_(0)^3(2)^xdx=( ).A.(int )_(0)^3(2)^xdx=B.(int )_(0)^3(2)^xdx=C.(in

[题目]计算定积分: (int )_(-dfrac {pi )(2)}^dfrac (pi {2)}dfrac (1)(2)xcos xdx.

1.计算下列定积分:-|||-(1) (int )_(dfrac {pi )(3)}^pi sin (x+dfrac (pi )(3))dx-|||-(2) (

5.设 _(1)=(int )_(0)^1xdx , _(2)=(int )_(0)^1sin xdx , _(3)=(int )_(0)^1tan xdx,