Prove that 1 - cos Asin2A - 11 - cos A

LHS=1 #160; + cos Asin^2A #160; #160; #160; #160; #160; #160; #160; =1+cos A1 cos ^2A #160; #160; #160; #160; #16 ...

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Trigonometric Equations

Prove that ...

Question

Prove that $\frac{1 + cos A}{{sin}^{2} A} = \frac{1}{1 - cos A}$

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