prove this identity
kylar890:
\frac{-1+\cos ^2\left(α\right)+\sin \left(α\right)+\cos \left(α\right)\sin \left(α\right)}{\sin \left(α\right)\left(\cos \left(α\right)-1+\sin \left(α\right)\right)}
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the identity is true
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I hope you understand
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