Originally Posted by

**gkk** For example let's take

- 1 + sqrt(3) i

I want t change the above expression into polar form.

I know how to change it to polar form in the form of r*cis(thetha)

I know how to get r and thetha, but my issue lies with getting the exact thetha value (meaning I want the answer in a fraction format with pi and not in decimal format as the calculator gives out)

So for the initial expression above, the exact value of thetha would be 2*pi/3

Could someone explain how to get 2pi/3 ?

Thank you.