i think it is almost similar on how you would derive the non-hyperbolic ones..
I've been trying this for ages but I just can't do it and i'm guessing its a stupidly simple answer >< please help!!
The question asks...
Using the formulae for sinh(2x) and cosh(2x) in terms of sinh(x) and cosh(x), show that
tanh(2x)= (2tanh(x))/(1+tanh^2(x))
Please help!