The equation of a wave travelling on a string is \[y=4\sin \frac{\pi } – McqOptions

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1.	The equation of a wave travelling on a string is \[y=4\sin \frac{\pi }{2}\left( 8t-\frac{x}{8} \right)\]. If x and y are in cm, then velocity of wave is [MP PET 1990]
A.	64 cm/sec in ? x direction
B.	32 cm/sec in ? x direction
C.	32 cm/sec in + x direction
D.	64 cm/sec in + x direction
Answer» E.

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