Simple Harmonic Motion Problem

1. What is the difference between ψ = Amod(t) cos (wavt)and the simple harmonic oscillator?

3. A. The amplitude is time dependent
B. The amplitude,Amod , 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.

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