1. The problem statement, all variables and given/known data A transverse traveling wave on a cord is represented by D = 0.38sin(5.1x+30t) where D and x are in meters and t is in seconds. Determine maximum and minimum speeds of particles of the cord. 2. Relevant equations First derivative 3. The attempt at a solution I took the first derivative with respect to x dx/dD = (5.1) .38cos(5.1x+10t) cosine's max value is at 1 so i set cos(5.1x+30t) = 1 then I solved : (5.1)(.38)(1) = 1.94 m/s Im not sure if this is right. All help will be appreciated.