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Mathematics, 26.06.2019 20:00 kayli53531
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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Which expression is equivalent to cos(1.4x) − cos(0.6x)? a. -2sin x sin(0.4x) b. 2sin x sin(0.4x)...
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