Consider two harmonic motions of different frequencies: (x_{1}(t)=2 cos 2 t) and (x_{2}(t)=cos 3 t). Is the
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Consider two harmonic motions of different frequencies: \(x_{1}(t)=2 \cos 2 t\) and \(x_{2}(t)=\cos 3 t\). Is the sum \(x_{1}(t)+x_{2}(t)\) a harmonic motion? If so, what is its period?
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