I have to put 2(cos(pi/3)+isin(pi)/3) into rectangular form. I need some help as to where to begin. Can anyone help? Thanks.
Greetings,
You can use Euler's Identity (AKA Euler's Formula): $\displaystyle re^{i\theta} \; = \; rcos(\theta) \; + \; irsin(\theta)$
This can be converted to Cartesian coordinates using: $\displaystyle z \; = \; x \; + \; iy$
So,
$\displaystyle z \; = \; re^{i\theta}$
$\displaystyle x \; = \; rcos(\theta)$
$\displaystyle y \; = \; irsin(\theta)$
Hopefully that helps.