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

Smart Alex Mathematics 298 6 months ago
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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

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