You will be expected to be able to prove a trigonometric identity such as the examples below. In the videos I show you how to set out an identity and what to look for.

Learn the Pythagorean identities below and then try the examples that follow. This is a tricky topic and one that I find students give in too quickly, be patient and it will come. Hopefully this will be a start for you.

Pythagorean Identities:

- sin
^{2}θ + cos^{2}θ ≡ 1 - 1 + tan
^{2}θ ≡ sec^{2}θ - 1 + cot
^{2}θ ≡ cosec^{2}θ