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The displacement of a particle ( in mete...

The displacement of a particle ( in meter ) from its mean position is given by the equation `y = 0.2 ( cos^(2) "" (pi t)/( 2) - sin^(2) "" ( pi t )/( 2))`, The motion of the above particle is

A

not simple harmonic

B

simple harmonic with amplitude 0.2m

C

simple harmonic with the period double that of a second's pendulum

D

simple harmonic with amplitude 0.4 m

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The correct Answer is:
B
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