(int )_(0)^dfrac (pi {4)}dfrac (x)(1+cos 2x)dx=( ) .(int )_(0)^dfrac (pi {4)}dfr
int dfrac (1)(1+cos 2x)dx=______.______.
( 20 int dfrac (dx)(1+cos 2x) ;
int dfrac (sin x)(1+{cos )^2x}dx=-|||-__
(int )_(-dfrac {pi )(2)}^dfrac (pi {2)}((cos )^2x+dfrac (xcos x)(1+{cos )^2x})dx
)int dfrac (1)({cos )^2x(sin )^2x}dx.
计算下列不定积分int dfrac (1)(1+cos 2x)dx计算下列不定积分
int dfrac (cos 2x)(cos x+sin x)dx
求下列不定积分:-|||-(22) int dfrac (cos 2x)({cos )^2x(sin )^2x}dx ;
(3) (int )_(0)^dfrac (pi {4)}dfrac (x)(1+cos 2x)dx= () .-|||-(A) dfrac (pi )(8)+