Part of SHM is graphed in the figure. Here, \( y \) is displacement from mean position. The corr...

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Part of SHM is graphed in the figure. Here, \( y \) is displacement from mean position. The correct equation describing the SHM is
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(a) \( y=4 \cos (0.6 t) \)
(b) \( y=2 \sin \left(\frac{10}{3} t-\frac{\pi}{2}\right) \)
(c) \( y=2 \sin \left(\frac{\pi}{2}-\frac{10}{3} t\right) \)
(d) \( y=2 \cos \left(0.6 t+\frac{\pi}{2}\right) \)
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