9.计算下列定积分:-|||-(1) (int )_(0)^asqrt ({a)^2-(x)^2}dx(agt 0);

4.计算下列定积分:-|||-(3) (int )_(0)^a(x)^2sqrt ({a)^2-(x)^2}dx(agt 0) :

计算下列定积分：(int )_(0)^sqrt (2)sqrt (2-{x)^2}dx；计算下列定积分：；

计算下列积分：(int )_(0)^sqrt (2)sqrt (2-{x)^2}dx.计算下列积分：.

计算下列定积分。-|||-(int )_(0)^1x(e)^-dfrac ({x^2)(2)}dx

(1) (int )_(0)^a(x)^2sqrt ({a)^2-(x)^2}dx(agt 0);

计算下列定积分。-|||-(int )_(0)^1dfrac ({x)^4}(1+{x)^2}dx

(int )_(0)^a(x)^2sqrt ({a)^2-(x)^2}dx(agt 0)

(3)(int )_(0)^a(x)^2sqrt ({a)^2-(x)^2}dx(agt 0);

计算下列定积分。-|||-(int )_(-1)^3|2-x|dx

[题目]-|||-计算下列定积分.-|||-(int )_(0)^dfrac (pi {2)}|sin x-cos x|dx ;