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The displacement of a particle is represented by the equation $y = 3 c o s (\frac{π}{4} - 2 ω t)$ . The motion of the particle is :
simple harmonic with period $\frac{2 π}{ω}$
simple harmonic with period $\frac{π}{ω}$
periodic but not simple harmonic
non-periodic.

A

periodic but not simple harmonic

B

simple harmonic with period

\frac{2 π}{ω}

C

simple harmonic with period

\frac{π}{ω}

D

non-periodic.

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