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Trigonometryhard
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What is the period of f(x)=sin⁡(x)cos⁡(3x)+cos⁡(x)sin⁡(3x)f(x) = \sin(x) \cos(3x) + \cos(x) \sin(3x)f(x)=sin(x)cos(3x)+cos(x)sin(3x)?