Here are the general steps in proving trigonometric identities:

- Start with one side. If you get stuck, then continue on other side.
- Rewrite all secants, cosecants, tangents, and cotangents in terms of sines and cosines.
- Use other known trig identities to simplify more complicated expressions. Avoid taking square roots or raising to powers. Do not cross multiply.
- Find a common denominator.
- Simplify whenever you can by combining like terms and factoring.

As you work, you should note any restrictions on the variable.