问题标题:
lim(x→0)sin5x/tan2x怎么求,
问题描述:
lim(x→0)sin5x/tan2x怎么求,
孙连恒回答:
lim(x→0)sin5x/tan2x
=lim(x→0)(sin5x/5x·5x/2x·2x/tan2x)
=lim(x→0)(sin5x/5x)·lim(x→0)(5x/2x)·lim(x→0)(2x/tan2x)
=1·5/2·1
=5/2
查看更多