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_{mod}(t) cos (w

_{av}t)and the simple harmonic oscillator?

3. A. The amplitude is time dependent

B. The amplitude,A

_{mod}, is twice the amplitude of the simple harmonic oscillator, A.

C. The oscillatory behavior is a function of ? instead of the period, T.

I'm not sure what the difference is. I thought that the equations are similar but that was incorrect.