The displacement $x$ (in metre) of a particle in simple harmonic motion is related to time $t$ (in seconds) as $x = 0.01 \cos \left( \pi t + \frac{\pi}{4} \right)$. The frequency of the motion will be

  • A
    $0.5 \, Hz$
  • B
    $1.0 \, Hz$
  • C
    $\frac{\pi}{2} \, Hz$
  • D
    $\pi \, Hz$

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