so that the equation becomes
This means that
You would need to convert to polars and use DeMoivre's Theorem to find .
Case 1: .
Note that is in Quadrant 2.
Using DeMoivre's Theorem:
It is also important to note that there is another solution, and the two solutions are equally spaced along the unit circle. Can you find it?
Case 2: .
Follow the same procedure as above. Note that is in quadrant 4.