Question

Simplify (1-cosΘ)(1+cosΘ) / (1-sinΘ)/(1+sinΘ)?

Answer 1

$\frac{(1-cosx)(1+cosx)}{(1-sinx)(1+sinx)} \\ \\ \frac{1-cos^2x}{1-sin^2x} \\ \\ \frac{sin^2x}{cos^2x} \\ \\ tan^2x$