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lim _(xarrow 0)dfrac ({e)^x-(e)^-x}(sin x)=()-|||-__。。
求下列极限：lim _(xarrow 0)dfrac ({e)^x-(e)^-x-2x}(x-sin x)-|||-__.求下列极限：.
(2) lim _(xarrow 0)dfrac ({e)^x-(e)^-x}(sin x);
lim _(xarrow 0)dfrac (x-sin x)(x+sin x)..
填空题-|||-lim _(xarrow 0)dfrac ({e)^x-(e)^-x}(sin x)= __
lim _(xarrow 0)dfrac (tan x-sin x)(x)
lim _(xarrow a)dfrac (sin x-sin a)(x-a)。。
(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}