Angle Formulae

Summary

there are four sets of formulae which make the solving and manipulation of trigonometric equations and identities easier.

these are:

compound angle formulae
double angle formulae
product to sum formulae
sum to product formulae

all of these formulae are all provided in the tables issued for the bursary examination, although, as always, it is useful if you can memorise them. you are not required to learn how they are derived and proved but you should be able to follow the working.

 

Key Skills

use the following formulae:

  • compound angle formulae
  • double angle formulae
  • product to sum formulae
  • sum to product formulae

to help solve equations and prove identities.

Vocabulary

compound angle formulaedouble angle formula, product to sum formulae, sum to product formulae.