A Level Maths Notes: C3 – Trigonometric Identities
The best way to learn how to prove trigonometric identities is to do lots of example, there being ever so many identities to prove.
Example: Prove
Now divide every term in the
numerator and denominator by
to
give
Example: Prove the identity
Divide every term in the
numerator and denominator byto
give
Now perform long division in
the to get
Example:
Example: Prove
