JEE Mains Model Paper 4

A transverse harmonic wave on a string is described by y (x,t) = 3.0 sin (36t + 0.081 x +

π

4

). Where x and y are in cm and t is in sec. The positive direction of x is from left to right.
a) The wave is travelling from right to left
b) The speed of the wave is 20m/s
c) Frequency of the wave is 5.7 Hz
d) The least distance between two successive crests in the wave is 2.5 cm, then