Verify the identity sin 3x sin 5x cos 3x cos 5x cot 4x Start

Last updated: 2/18/2023

Verify the identity sin 3x sin 5x cos 3x cos 5x cot 4x Start with the numerator of the left side and apply the appropriate formula of sum to produc sin 3x sin 5x 2 sin 3x 5x 2 COS 3x 5x 2 Now use the sum to product cos 3x cos 5x Do not simplify Do not simplify formula on the denominator of the left side