# Complex numbers problem need help

1. Nov 21, 2007

### Silmax

complex numbers problem....need help

Hi all

Express 2.91e to the power of 1+j2 in Cartesian form (x+jy)

Sorry writing it out, but I don't know how to set it out on the computer.

I have tried solving the 1+j2 first then adding this to the real number then working it out in polar form then converting it to Cartesian, but I don't know if this is right.

Any help would be much appreciated.
Thank you

2. Nov 21, 2007

### Staff: Mentor

You should start by separating the two parts of the complex exponential:

$$2.91 e^{1+j2} = 2.91{e^1} {e^{j2}}$$

and then use Euler's formula on the $${e^{j2}}$$ part.... Does that help?

http://en.wikipedia.org/wiki/Complex_exponential

.

3. Nov 21, 2007

### Silmax

Thank you

I shall give it a go.