Question

√(1-sinA)/(1+sinA) =?

Answer 1

Hello,
$\sqrt\frac{{1-sinA}}{1+sinA}$;
$= \sqrt{\frac{{1-sinA}}{1+sinA}\times \frac{1-sinA}{1-sinA} }$;
$=\sqrt{\frac{{(1-sinA) ^{2} }}{1-sin^{2} A}}$;
$=\sqrt{\frac{{(1-sinA) ^{2} }}{cos^{2} A}}$
$= \frac{(1-sinA)}{cosA}$;
$= \frac{1}{cosA} + \frac{sinA}{cosA}$;
$=secA+tanA$

bye :-)