1. The problem statement, all variables and given/known data A transverse wave travels on a string whose mass density is kg/m. The displacement (in meters) is given as a function of time and position as: D(x,t) = 1.5sin(3x-24t+90°) What is the velocity and direction of the wave? What is the speed of the particle located at x=8 and t=1? 2. Relevant equations Derivatives of the former. [tex]∂^2D/∂t^2=v^2(∂^2D/∂x^2)[/tex] 3. The attempt at a solution I took the partial derivatives with respect to both x and t. Applied them to the wave equation. But I don't understand how I'm supposed to get any figures to answer the questions above. [tex]v=sqrt(-864sin(-24t)/(-13.5sin(3x))[/tex] ----> not sure what I do after this point.