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The funtion of time representing a simpl...

The funtion of time representing a simple harmonic motion with a period of `pi/omega` is :

A

`sin^(2) (omega t)`

B

`cos (omega t)+cos (2 omega t)+cos (3 omega t)`

C

`3 cos (pi/4-2 omega t)`

D

`sin (omega t)+cos (omega t)`

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