化简sin x/(1-cos x)√[(tan x-sin x)(tan)]化简sin x/(1-cos x)√[(tan x-sin x)/(tan x+sin x)]

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化简sinx/(1-cosx)√[(tanx-sinx)(tan)]化简sinx/(1-cosx)√[(tanx-sinx)/(tanx+sinx)]化简sinx/(1-cosx)√[(tanx-si

化简sin x/(1-cos x)√[(tan x-sin x)(tan)]化简sin x/(1-cos x)√[(tan x-sin x)/(tan x+sin x)]
化简sin x/(1-cos x)√[(tan x-sin x)(tan)]
化简sin x/(1-cos x)√[(tan x-sin x)/(tan x+sin x)]

化简sin x/(1-cos x)√[(tan x-sin x)(tan)]化简sin x/(1-cos x)√[(tan x-sin x)/(tan x+sin x)]
sin x/(1-cos x)√[(tan x-sin x)/(tan x+sin x)]
=sinx/(1-cosx)√[(1-cosx)/(1+cosx)
=sinx/(1-cosx)√[(1-cosx)^2/(1-(cosx)^2)]
=sinx/(1-cosx)(1-cosx)/|sinx|
=sinx/|sinx|
=1 if x∈[2nπ,(2n+1)π]
=-1 ifx∈[(2n-1)π,2n]