展开全部
let
y=π/2-x
lim(x->π/2) tanx/tan(3x)
=lim(y->0) coty/cot(3y)
=lim(y->0) tan3y/tany
=lim(y->0) (3y)/y
=3
y=π/2-x
lim(x->π/2) tanx/tan(3x)
=lim(y->0) coty/cot(3y)
=lim(y->0) tan3y/tany
=lim(y->0) (3y)/y
=3
本回答被网友采纳
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询