Prove cos 3x, sin 3x and tan 3x Trigonometric Identities using De Moivre's Theorem

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#complexnumbers #demoivrestheorem #trigonometricidentities

In this video tutorial, we explain with examples on how to prove trigonometric identities involving sin3x, cos3x and tan3x using a combination of binomial expansion and De Moivre's theorem.

This is part of the NSW Extension 2 Mathematics topic - Complex Numbers
  1. Smart Alex Mathematics
  2. proving sin 3x cos3x tan3x using de moivre's theorem
  3. sin 3x cos 3x tan 3x trigonometric identities using De Moivre's theorem
  4. de moivre's theorem
  5. binomial expansion
  6. trigonometric identities
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