Use Osborn's rule or otherwise to prove that: a) 1 - tanh²x

Last updated: 8/4/2022

Use Osborn's rule or otherwise to prove that: a) 1 - tanh²x = sech²x b) coth²x - 1 = cosech²x c) cosh²x = 2sinh²x + 1 d) tanh²x = e) cosh²x = f) cothx = 2cosech²x + tanhx