Question

Hyperbolic functions..

Answer 1

Prove \(\LARGE {tanh(lnx)=\frac{x^2-1}{x^2+1}} \)

Answer 2

use the definition of tanh(x) = sinh(x) / cosh(x), then use definition of sinh(x) and cosh(x), and then simplify

Answer 3

well hope that works coz I haven't tried that either hehe :D

Answer 4

yeah, it worked :D
https://www.wolframalpha.com/input/?i=%28e%5E%28ln%28x%29%29+-+e%5E%28-ln%28x%29%29%29+%2F+%28e%5E%28ln%28x%29%29%2B+e%5E%28-ln%28x%29%29%29

Answer 5

you got it @Luigi0210 ?