4.计算下列定积分:-|||-(3) (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);

(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：；

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

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

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

.计算下列定积分:-|||-(10) (int )_(1)^sqrt (3)dfrac (dx)({x)^2sqrt (1+{x)^2}}

2.计算下列定积分.-|||-(3) (int )_(-2)^2((x)^2sqrt (4-{x)^2}+x(cos )^5x)dx.

1.计算下列定积分:-|||-(10) (int )_(1)^sqrt (3)dfrac (dx)({x)^2sqrt (1+{x)^2}};

计算定积分 (∫)_(0)^2sqrt(4-(x)^2)dx= ____ ．计算定积分${∫}_{0}^{2}$$\sqrt{4-{x}^{2}}$dx= __