# Math Help - Trig functions

1. ## Trig functions

2. What's the question, find f(x)?

I'm going to assume that is the case. Recall that:
cos(-x) = cos(x)
sin(-x) = -sin(x)
tan(-x) = -tan(x)

This is the same for their reciprocals. Knowing this, we reach here:

$-\frac{\cos{x}}{\sin{x}}\cdot \cos{x} - \sin{x}$

Combine sin(x) with the fraction to get:
$-\frac{\cos^2{x}}{\sin{x}} - \frac{\sin^2{x}}{\sin{x}}$

Can you continue now?

3. No...I don't know how to break that into something more simple