Using De Moivre's Theorem to Expand Trigonometric Sine Function

How to express sine function in terms of multiple of theta using Demoirve's theorem Chapters 0:00 Example 3 00:34 Deriving Demoirve's theorem 04:32 Binomial Expansion 07:02 Simplifying binomial series 9:13 Substitution method in DeMoirve's Theorem