we
use the formulae
A Level Maths Notes: FP2 – Proving Multiple Angle Hyperbolic Trigonometric Formulae
Proving multiple angle formulae for hyperbolic
trigonometric formulae is very similar to proving multiple angle
formulae for ordinary trigonometric functions. For instance, to prove
the formula
we
use the formulae
and
Take
and
To prove the formula
we
use the formulae
and
Takeand
Other formulae can be similarly proved.