当X趋于0时lim（tan x -sin x)/x∧3的极限 请用等价无穷小替换 谢谢

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lim(x→0)（tan x -sin x)/x^3
=lim(x→粗毕0)tan x(1 -cos x)/漏凳局x^3
=lim(x→0) x(x^2/2)/x^3
=1/返让2

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