1. The problem statement, all variables and given/known data Two sinusoidal waves in a string are defined by functions y1= (2.00cm)sin(20x-32t) y2=(2.00cm)sin(25x-40t) where y and x are cm and t is sec (a) What is the phase difference between these two waves at the point x = 5 cm and t = 2 s? (b) What is the position x value closes to the orgin for which the two phases differ by +/- pi at t = 2 s? (This location is where the two waves add to zero) 2. Relevant equations I use the equation given to me as y1 and y2 not sure if there is an equation for phase difference 3. The attempt at a solution (a) I plugged in 5 cm and 2 s for y1 and y2 y1 = -1.9835 and y2 = 1.7018 but Im not sure what these answers mean and if they are relevant b) (2sin(20x-32*2) + 2sin(25x-40*2) = 0 and solve for x? Is this correct?Do I do inverse sin and then move the (32*2 and 40*2) to the other side? Thanks for any help!!!!