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2:59
YouTube
Math Tutor Deep Dive
(Pre-Calculus/Trignometry) Proving Trigonometric Identities: A Step-by-Step Guide
This Video (based on our math blog and class recordings) outlines a step-by-step process for proving a trigonometric identity. It begins by demonstrating how to rewrite complex angles like cosine of four x and cosine of three x using compound angle identities. Next, the text expands these expressions and then substitutes terms with double-angle ...
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