Question

What is the value of `tanh(1)`?

Answer 1

0.761595, nearly

Explanation:

Use `sinh x = (e^x-e^(-x))/2 and cosh x =(e^x+e^(-x))/2`.

`tanh 1`

`= sinh 1/cosh 1`

`=(e-e^(-1))/(e+e^(-1))`

`=(e^2-1)/(e^2+1)`

`=0.76159`, nearly.