1. A wave has the equation y = 4 sin (3p t - 6p x) (SI units)
Sketch the graph of the displacement vs. time at a position x = 0.400 m.
At x = 0.400
y = 4 sin[3p t - 6p
(0.4)] = 4 sin(3p t - 2.4p )
Find the places where y = 0