If $$(secA - tanA)^2$$ = x, then the value of x is
Expression : $$(secA - tanA)^2$$
= $$(\frac{1}{cos A} - \frac{sin A}{cos A})^2$$
= $$(\frac{1 - sin A}{cos A})^2 = \frac{(1 - sin A)^2}{cos^2 A}$$
=Â $$\frac{(1 - sin A)^2}{1 - sin^2 A}$$
= $$\frac{(1 - sin A)^2}{(1 - sin A)(1 + sin A)}$$
= $$\frac{1 - sin A}{1 + sin A}$$
=> Ans - (C)
Create a FREE account and get:
