√(1-cosθ)/(1+cosθ)?
回答 (1)
2015-08-24 11:34 am
√[(1－Cosθ)/(1+Cosθ)]
=√[(2Sin^ 2 θ)/(2Cos^2 θ)]
=√Tan^2 θ
=｜Tanθ｜
=√[(2Sin^ 2 θ)/(2Cos^2 θ)]
=√Tan^2 θ
=｜Tanθ｜
收錄日期: 2021-04-30 19:17:32
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