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

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

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

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

求不定积分int dfrac (1)(2x)sqrt (ln x)dx=（）.int dfrac (1)(2x)sqrt (ln x)dx=int dfrac

计算下列不定积分int dfrac (1)(1+cos 2x)dx计算下列不定积分

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

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

例2.16 计算不定积分 int (sin )^2x(cos )^3xdx.

[题目]如果 (cos x)=dfrac ({sin )^2x}(cos 2x), 则 f(x)= () )-|||-

求极限lim _(xarrow 0)(dfrac (1)({sin )^2x}-dfrac ({cos )^2x}({x)^2})= ()求极限