How to use De Moivre's theorem to solve equations?
![enter image source here](https://useruploads.socratic.org/zfCc7OovQ0WqajU50v5w_image.jpg)
Can someone please explain to me how to do question 1a? Thanks!
Can someone please explain to me how to do question 1a? Thanks!
1 Answer
Mar 2, 2018
The solution is
Explanation:
We need
The equation is
Therefore,