(1 + sinA)/(1 - sinA) is equal to?
Expression : $$\frac{1 + sin A}{1 - sin A}$$
Replacing $$sin A$$ by $$\frac{1}{cosec A}$$
= $$\frac{1 + \frac{1}{cosec A}}{1 - \frac{1}{cosec A}}$$
= $$\frac{\frac{1 + cosec A}{cosec A}}{\frac{cosec A - 1}{cosec A}}$$
= $$\frac{cosec A + 1}{cosec A - 1}$$
=> Ans - (B)
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