(int )_(0)^2pi |sin x|dx.

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

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

设 M=int_(-(pi)/(2))^(pi)/(2) (sin x)/(1+x^2) cos^4 x dx，N=int_(-(pi)/(2))^(pi)/(

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

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

计算：int((sin ax-{{{e)}^(x)/(b)}})dx．计算：$\int{(\sin ax-{{\text{e}}^{\frac{x}{b}}}}

(int )_(-dfrac {pi )(2)}^dfrac (pi {2)}dfrac (|x|sin x)(1+{cos )^3x}dx=(int )_(-

求int dfrac (cos x)(sin x+cos x)dx.求.

(int )_(-pi )^pi sqrt ({pi )^2-(x)^2}dx= )(int )_(-pi )^pi sqrt ({pi )^2-(x)^2}d

[题目]计算定积分: (int )_(-dfrac {pi )(2)}^dfrac (pi {2)}((|x|+sin x))^2dx