Question #d3532
1 Answer
Oct 30, 2017
Explanation:
We can solve this using De Moivre's theorem, what states;
What we will use without proof, but we can prove by induction
So applying this theorem;
So hence apply the knowledge that;
What we can see when sketching these functions graph{sinx [-10, 10, -5, 5]}
graph{cosx [-10, 10, -5, 5]}
As
So hence