## Calculus 8th Edition

The Domain is $x \ne \frac{\pi}{2}+2n\pi$, (n any integer)
$f(x) = \frac{cos (x)}{1-sin(x)}$ Lets find the Domain: $1 - sin (x) \ne 0$ $sin (x) \ne 1$ $x \ne \frac{\pi}{2}+2n\pi$, (n any integer) The Domain is $x \ne \frac{\pi}{2}+2n\pi$, (n any integer)