int dfrac (dx)(3+{sin )^2x}

int dfrac (dx)(3+{sin )^2x}

int dfrac (dx)(3+{sin )^2x}

( (int )_(dfrac {pi )(4)}^dfrac (pi {3)}dfrac (x)({sin )^2x}dx ;

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

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

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

int dfrac (1)({x)^2}sin dfrac (3)(x)dx= __

5.求不定积分 int dfrac ({sin )^2x}(1+{sin )^2x}dx.

(int )_(0)^dfrac (pi {2)}sqrt (1-sin 2x)dx;

求下列不定积分:-|||-(22) int dfrac (cos 2x)({cos )^2x(sin )^2x}dx ;