[题目] int dfrac (x+sin x)(1+cos x)dx,

int dfrac (cos 2x)(cos x+sin x)dx

(int )_(0)^dfrac (pi {4)}dfrac (x)(1+cos 2x)dx=( ) .(int )_(0)^dfrac (pi {4)}dfr

int dfrac (sin x-cos x)(sin x+cos x)dx==

int dfrac (1)(1+cos 2x)dx=______.______.

.int dfrac (1+{cos )^2x}(1+cos 2x)dx

计算int dfrac (dx)(cos x(1+sin x))计算

( 20 int dfrac (dx)(1+cos 2x) ;

int dfrac (sin x+cos x)(sqrt [3]{sin x-cos x)}dx

求int dfrac (cos x)(sin x+cos x)dx.求.

int dfrac (sin x)(1+{cos )^2x}dx=-|||-__