问题标题:
【坐等.limtanx-x/x-sinxx趋于o】
问题描述:
坐等.limtanx-x/x-sinxx趋于o
吕雁飞回答:
lim(x→0)(tanx-x)/(x-sinx)
=lim(x→0)(sec^2x-1)/(1-cosx)
=lim(x→0)(tan^2x)/(x^2/2)
=lim(x→0)x^2/(x^2/2)
=2
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