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A particle moves in the x-y plane under ...

A particle moves in the x-y plane under the action of a force `vec F` such that its linear momentum `vec P` at any time t is `vec P=2cost hati+2sint hatj`. The angle between `vec F` and `vec P` at a given time t will be

A

`pi/6`

B

`pi`

C

Zero

D

`pi/2`

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