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The displacement of a particle varies wi...

The displacement of a particle varies with time according to the relation `y = alpha sin omegat + b cos omegat`.

A

The motion is oscillatory but not SHM

B

The motion is SHM with amplitude a + b

C

The motion is SHM with amplitude `a^2+b^2`

D

The motion is SHM with amplitude `sqrt(a^2+b^2)`

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