(4) int (e)^x(sin )^2xdx.

.(int )_(e)^x(sin )^2xdx.

.(int )_(e)^x(sin )^2xdx.

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

(4)int_((pi)/(4))^(pi)/(3)(x)/(sin^2)xdx;(4)$\int_{\frac{\pi}{4}}^{\frac{\pi}{3}

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

(9) (int )_(-dfrac {pi )(2)}^dfrac (pi {2)}|sin x|arctan (e)^xdx

定积分(int )_(-4)^4((e)^(x^2)sin x+2)dx=( )(int )_(-4)^4((e)^(x^2)sin x+2)dx=( )定

不定积分int (({e)^x+2)}^3(e)^xdx=()A、 int (({e)^x+2)}^3(e)^xdx=()B 、int (({e)^x+2)}^

(2) int x(e)^-xdx;

（0.7分）int sin 4xdx=dfrac (1)(4)int sin 4xdx=dfrac (1)(4)cos 4x+cA 正确B 错误89