limx/根号1-cosx=?x趋于正0

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limx/根号1-cosx=?x趋于正0
limx/根号1-cosx=?x趋于正0

limx/根号1-cosx=?x趋于正0
limx/根号(1-cosx)
=limx/根号[2(sinx/2)^2]
=limx/根号[2*x^2/4]
=1/根号[1/2]
=根号2