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lim(tanx-sinx)/(sinx)3
人气:375 ℃ 时间:2019-12-29 23:04:02
解答
lim(x→0)(tanx-sinx)/(sinx)^3
=lim(x→0)tanx(1-cosx)/x^3
=lim(x→0)x*(1/2x^2)/x^3
=1/2
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