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Prove that (cotA-cosA)/(cotA+cosA)=(c o ...

Prove that `(cotA-cosA)/(cotA+cosA)=(c o s e cA-1)/(c o s e cA+1)`.

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To prove that \[ \frac{\cot A - \cos A}{\cot A + \cos A} = \frac{\csc A - 1}{\csc A + 1}, \] we will start by simplifying the left-hand side (LHS). ...
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