Question 9

What is the value of $$cos^2A/(1 + sinA)$$?

Solution

Expression : $$cos^2A/(1 + sinA)$$

Multiplying both numerator and denominator by $$(1-sinA)$$

= $$\frac{cos^2A}{1+sinA} \times \frac{(1-sinA)}{(1-sinA)}$$

= $$\frac{cos^2A(1-sinA)}{1-sin^2A} = \frac{cos^2A(1-sinA)}{cos^2A}$$

= $$1-sinA$$

=> Ans - (B)

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