- #1

Felipe Lincoln

Gold Member

- 99

- 11

## Homework Statement

Show that ##\tanh(z/2) = \dfrac{\sinh x+i\sin y}{\cosh x+\cos y}##

## Homework Equations

Not clear what I'm supposed to use

## The Attempt at a Solution

Tried using the relation of sin and cosine with ##e^{iz}##, and also worked with the expanded ##\sin(x+iy)## and cosine as well but I'm still stuck.