极限lim _(xarrow 0)dfrac (tan 3x)(x)=__________

lim _(xarrow 0)dfrac (tan 5x)(3x)=dfrac (5)(3) ()

(8) lim _(xarrow dfrac {pi )(2)}dfrac (tan x)(tan 3x)

(8) lim _(xarrow dfrac {pi )(2)}dfrac (tan x)(tan 3x)

(3) lim _(xarrow 0)dfrac (tan x-sin x)({sin )^3x}

(3) lim _(xarrow 0)dfrac (tan x-sin x)({sin )^3x};

(5) lim _(xarrow 0)dfrac (tan x-sin x)({sin )^3x}

3.lim _(xarrow 0)dfrac (tan x-sin x)({sin )^3x}.3..

利用等价无穷小的性质，求下列极限：（1）lim _(xarrow 0)dfrac (tan 3x)(2x)（2）lim _(xarrow 0)dfrac (ta

3.极限 lim _(xarrow 0)(dfrac (1+x)(tan x)-dfrac (1)(x))=

求极限lim _(xarrow {0)^+}((dfrac {1)(x))}^tan x=求极限