6、已知 =sqrt (xln xsqrt {1-sin x)} ,则 ^circ = .__

(6) lim _(xarrow 0)dfrac (sqrt {1+tan x)-sqrt (1+sin x)}(xsqrt {1+{sin )^2x}-x}

[题目] lim _(xarrow 0)dfrac (sqrt {1+tan x)-sqrt (1+sin x)}(xsqrt {1+{sin )^2x}-x}

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

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

[题目]求极限 lim _(xarrow 0)dfrac (sqrt {1+2sin x)-x-1}(xln (1+x))

求定积分 (int )_(0)^dfrac (pi {2)}sqrt (1-sin 2x)dx的值.求定积分 的值.

已知 =sqrt (xsqrt {x)}+xtan x-(e)^2, 求y`.

dfrac (sqrt {3)}(2)sin (15)^circ +dfrac (1)(2)cos (15)^circ 的值为( )A．dfrac

[题目]曲面 =(x)^2(1-sin y)+(y)^2(1-sin x) 在点(1,0,1)处-|||-的切平面方程为 __

求极限 lim (sin sqrt (x+1)-sin sqrt (x)).