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Home  >>  CBSE XII  >>  Math  >>  Model Papers
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Prove that : $ \cot^{-1} \bigg(\large \frac{ \sqrt{1+\sin x}+\sqrt{1-\sin\: x}}{\sqrt{1+\sin\: x}-\sqrt{1-\sin x}} \bigg)=\frac{x}{2}.$

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