lim x趋向于0 (tanx-sinx)/x

问题描述:

lim x趋向于0 (tanx-sinx)/x

lim x->0 (tanx-sinx)/x
=lim x->0 (1/cosx-1)sinx/x
=lim x->0 (1/cosx-1)
=1-1
=0cos0=1吧1/cos0=1/1=1