# Eiθ = cos θ + i sen θ

1. Mar 16, 2013

### eljota38

Can anyone prove me this stament please.

2. Mar 16, 2013

### gnrlies00

the proof to Euler's formula

e=cosθ+isinθ

is using taylor series for the exponential function

For any complex number z, we define ez by

ez=$\sum$$\frac{z^n}{n!}$.

3. Mar 16, 2013

### eljota38

thanks a lot I think you were a great help

4. Mar 16, 2013