A wave equation which given the dispplacement along the y-direction is given by ,
`y = 10^(-4)sin (60t +2x)`
where x and y are in matre and t is time in second. This represents a wave
A. travelling with a velocity of 30 m/s in the negative x- direction
B. of wavelength `(pi)`m
C. of frequency 30/`(pi)` Hz
D. of amplitube `10^(-4)`
