limx→0x/Sin(x/2)的极限是什么

问题描述:

limx→0x/Sin(x/2)的极限是什么

limx→0x/Sin(x/2)
=2limx→0(x/2)/Sin(x/2)
=2*1
=2为什么是2乘以1 啊x/2趋于0sin(x/2)/(x/2)极限是1