$$\sqrt{[\frac{(1 - sinA)}{(1 + sinA)}}]$$ is equal to?
Expression : $$\sqrt{[\frac{(1 - sinA)}{(1 + sinA)}}]$$
Multiplying both numerator and denominator by $$(\sqrt{1-sinA})$$
=Â $$\sqrt{[\frac{(1 - sinA)}{(1 + sinA)}}]$$ $$\times \sqrt{\frac{(1-sinA)}{(1-sinA)}}$$
= $$\sqrt{\frac{(1-sinA)^2}{1-sin^2A}} = \sqrt{\frac{(1-sinA)^2}{cos^2A}}$$
= $$\frac{1-sinA}{cosA} = (\frac{1}{cosA})-(\frac{sinA}{cosA})$$
= $$secA-tanA$$
=> Ans - (A)
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