9.int x(cos )^2dfrac (x)(2)dx

[题目] int (cos )^2dfrac (x)(2)dx= __

例: (int )_(0)^dfrac (pi {2)}(cos )^2dfrac (x)(2)dx= __ .

[题目]求不定积分: (int )(cos )^2dfrac (x)(2)dx

(int )_(-2)^2dfrac (x+|x|)(2+{x)^2}dx=

.(int )_(-2)^2dfrac (x+|x|)(2+{x)^2}dx= __ .

(int )_(1)^2dfrac (dx)(x(1+sqrt {2x))}=( )A.(int )_(1)^2dfrac (dx)(x(1+sqrt {2x

4.求下列不定积分-|||-(11) int (cos )^2dfrac (x)(2)dx

(int )_(1)^2dfrac (sqrt {{x)^2-1}}(x)dx

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

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