化简:根号下1-cos(2π+θ)/1+cos(2π+θ)+根号下1+cos(2π+θ)/1-cos(2π+θ)( π

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化简:根号下1-cos(2π+θ)/1+cos(2π+θ)+根号下1+cos(2π+θ)/1-cos(2π+θ)( π

化简:根号下1-cos(2π+θ)/1+cos(2π+θ)+根号下1+cos(2π+θ)/1-cos(2π+θ)( π
化简:根号下1-cos(2π+θ)/1+cos(2π+θ)+根号下1+cos(2π+θ)/1-cos(2π+θ)( π

化简:根号下1-cos(2π+θ)/1+cos(2π+θ)+根号下1+cos(2π+θ)/1-cos(2π+θ)( π
√[1-cos(2π+θ)]/[1+cos(2π+θ)]+√[[1+cos(2π+θ)]/[1-cos(2π+θ)]
=√(1-cosθ)/(1+cosθ)+√(1+cosθ)/(1-cosθ)
=√(1-cosθ)^2/(sinθ)^2+√(1+cosθ)^2/(sinθ)^2
=|1-cosθ|/|sinθ|+|1+cosθ|/|sinθ|
=[(1-cosθ)+(1+cosθ)]/(-sinθ)
=-2cscθ