Solution
Expression : $$\sqrt{[\frac{(1 - sinA)}{(1 + sinA)}}]$$
Multiplying both numerator and denominator by $$(\sqrt{1+sinA})$$
= $$\sqrt{[\frac{(1 - sinA)}{(1 + sinA)}}]$$ $$\times \sqrt{\frac{(1+sinA)}{(1+sinA)}}$$
= $$\sqrt{\frac{1-sin^2A}{(1+sinA)^2}} = \sqrt{\frac{cos^2A}{(1+sinA)^2}}$$
= $$\frac{cosA}{1+sinA}$$
=> Ans - (C)
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