lim(cosx-1)/x,x趋于0,怎么化简成-sinx?
问题描述：
lim(cosx-1)/x,x趋于0,怎么化简成-sinx?
答
lim【x→0】(cosx-1)/x
=lim【x→0】(-x²/2)/x
=lim【x→0】-x/2
=0