1. The problem statement, all variables and given/known data A transverse traveling wave on a cord is represented by D = 0.48 sin (5.6x + 84t) where D and x are in meters and t in seconds. Determine the maximum and minimum speeds of particles of the cord. 3. The attempt at a solution I'm guessing these speeds are found by the partial time derivatives of D: dD/dt = 40.32 cos (5.6x + 84t). Is this right? So the answer is 40.32 m/s??