当x→0时,变量 dfrac (1)({x)^2}sin dfrac (1)(x) 是-|||-__当x→0时,变量 dfrac (1)({x)^2}sin dfrac (1)(x) 是-|||-__

(sin x)=dfrac (1)({cos )^2x} in (0,dfrac (pi )(2)),则(sin x)=dfrac (1)({cos )^2x}

lim _(xarrow 0)dfrac ({x)^2sin dfrac (1)(x)}(tan x)=A.0B.1C.lim _(xarrow 0)dfrac

(11) lim _(xarrow 0)((dfrac {sin x)(x))}^dfrac (1{{x)^2}}

求下列函数的导数 ( 1 ) =sin dfrac (1)(x)( 2 )=sin dfrac (1)(x)( 3 )=sin dfrac (1)(x)求下列函

2.lim _(xarrow 0)(dfrac (2+{e)^dfrac (1{x)}}(1+{e)^dfrac (4{x)}}+dfrac (sin x)(|

lim _(xarrow 0)dfrac (1)(x)sin dfrac (1)(x)？？

计算 lim _(xarrow 0)dfrac (1)({x)^2}ln dfrac (sin x)(x) .

求lim _(xarrow 0)(dfrac (1)({sin )^2x}-dfrac (1)({x)^2}).求.

lim _(xarrow 0)cot x(dfrac (1)(sin x)-dfrac (1)(x))= __

lim _(xarrow 0)dfrac ({(1+{x)^2)}^dfrac (1{3)}-1}(sin {x)^2}=-|||-______________