Presentation that introduces compound angles and includes questions for students to expand and also includes answers. It then covers how to write a pair of waves as a single wave in the form Asin(x+a) ...
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What I wish I knew about compound angles in trig
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Solve the equation \(5\cos (6x - 20)^\circ + 3 = 7.25\), for \(0 \le x \le 180\).
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