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Mathematics 20 Online
OpenStudy (anonymous):

Which expression is equivalent to sin(0.6x) − sin(0.4y)? 2cos(0.5x)sin(0.1x) 2cos(0.5x)cos(0.1x) 2sin(0.5x)sin(0.1x) -2sin(0.5x)sin(0.1x) -2cos(0.5x)sin(0.1x)

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