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The displacement of a particle from its ...

The displacement of a particle from its mean position (in meter) is given by `Y = 0.2 sin(10 pi t + 1.5 pi) cos (10 pi t + 1.5 pi)`. The motion of the particle is

A

`20 pi`

B

`1/(20 pi)`

C

`1/(10 pi)`

D

`10 pi`

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The correct Answer is:
B
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