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The displacement of particle is represented by the equation y = 3\cos \left( {\frac{\pi }{4} - 2\omega t} \right). The motion of the particle is

a
simple harmonic with particle is
b
simple harmonic with period π/ω
c
periodic but not simple harmonic
d
non periodic

detailed solution

Correct option is B

Acceleration of the particle is Now The above equation represents SHM. Whose amplitude is 3 unit, time period is and initial phase is - π/4.

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