lim(x趋向0+)x/[(1-cosx)^(1/2)]

来源：学生作业帮编辑：搜狗做题网作业帮分类：数学作业时间：2024/05/24 17:14:57

[(1-cosx)^(1/2)]=2sin²(x/2),
则原式可化为x/√2sin(x/2),利用等价无穷小的概念,xx趋向0+)时,sin(x/2)~x/2
则原式为√2

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