lim (tanx-sinx)/x (x→0)的极 - 知识问答

lim (tanx-sinx)/x (x→0)的极限； lim (1-cos4x)/xsinx (x→0)的极限

1个回答

lim (tanx-sinx)/x (x→0)
=lim sec^2x-cosx)(x→0)
=1-1=0
lim (1-cos4x)/xsinx (x→0)
=lim (1/2)*16x^2/x^2 (x→0)
=8

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