Proof of Angle Addition Formulae | A-Level Maths

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In this A-Level Maths video I'll show you a proof to the compound angle formulae :)

Timestamps:

0:00 Intro
0:32 The Proof!

A-Level Trigonometry Playlist:

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been looking for a video of these proofs everywhere and couldn’t find one! have you got a list of all the proofs we need to memorise for a level maths?

heyitsadelinaaa