trigonometry

Question: $\sqrt{\frac{1-\sin A}{1+\sin A}}=$



1) $\sec A+\tan A$
2) $\tan \left( \frac{\pi }{4}-A \right)$
3) $\tan \left( \frac{\pi }{4}+\frac{A}{2} \right)$
4) $\tan \left( \frac{\pi }{4}-\frac{A}{2} \right)$
Solution: Explanation: No Solution
Trigonometric ratios of multiple and sub-multiple angles

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