Prove that (sin 3x + sin x) sin x + (cos 3x cos x) cos x

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Prove that (sin 3x + sin x) sin x + (cos 3x – cos x) cos x = 0

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An Introduction to Analysis

ISBN: 978-0132296380

4th edition

Authors: William R. Wade

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Posted Date: Mar 22, 2023 01:14 AM

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Prove that (sin 3x + sin x) sin x + (cos 3x cos x) cos x

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An Introduction to Analysis

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