Select the correct answer. Which expression is equivalent to cos (1.4x) - cos (0.6x) ? A. - 2sin x sin (0.4x) B. 2sin x sin (0.4x) C. - 2cos x cos (0.4x) D. 2cos x cos (0.4x)
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Home » Mathematics » Select the correct answer. Which expression is equivalent to cos (1.4x) - cos (0.6x) ? A. - 2sin x sin (0.4x) B. 2sin x sin (0.4x) C. - 2cos x cos (0.4x) D. 2cos x cos (0.4x)