求limx趋向兀/2 lnsinx/(x-兀/2)的极限
问题描述:
求limx趋向兀/2 lnsinx/(x-兀/2)的极限
答
limx→π/2 lnsinx/(x-/π2),(0/0型,洛必塔法则求导)
=limx→π/2 (cosx/sinx)/1
=0.