Question: Question 7 Complete the identity. sin x (sin 2x + sin 4x) = ? O cos x (cos 2x - cos 4x) O cos x

Question 7 Complete the identity. sin x (sin 2x + sin 4x) = ? O cos x (cos 2x - cos 4x) O cos x (cos 2x + cos 4x) O cos x (cos 2x + cos 4x) O COs x (cos 2x - cos 4x)

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