Question: Please break this answer down for me so I can understand how to get it wton Alta Answer Explanation Correct answer: 15 + 5 cos(2x)

Please break this answer down for me so I can understand how to get it

wton Alta Answer Explanation Correct answer: 15 + 5 cos(2x) + cos(4x) We have to apply the power reduction formula twice: 10 cost x = 10 (cos x) 1 + cos(2x) 2 = 10 2 10 10 10 1 + cos 2(2x) + 4 cos(2x) + 4 2 10 10 10 10 + cos(2x ) - + 4 8 Cos(4x) 30 10 8 + 5 cos(2x) + cos(4x) 15 = 4 + 5 cos(2x) + - cos(4x) FEEDBACK CO

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