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Mathematics, 17.10.2021 18:20 midsky

Prove that \frac{1}{ \csc(a) -  \ \cot(a)  }  -  \frac{1}{ \sin(a) }  =  \frac{1}{ \sin(a) }  -  \frac{1}{ \ \csc(a) +  \cot(a)   }
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