Phase of an SHM at given times

1. A.
   $\dfrac{\pi}{3}$ rad
2. B.
   $\dfrac{\pi}{2}$ rad
3. C.
   $\dfrac{2\pi}{5}$ rad
4. D.
   $\dfrac{2\pi}{3}$ rad

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1. A.
   $\pi$
2. B.
   $\frac{\pi}{2}$
3. C.
   $\frac{\pi}{4}$
4. D.
   $\frac{\pi}{8}$

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1. A.
   $\dfrac{\pi}{4}$
2. B.
   $\dfrac{3\pi}{5}$
3. C.
   $\dfrac{\pi}{6}$
4. D.
   $\dfrac{\pi}{2}$

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