1. The problem statement, all variables and given/known data [PLAIN]http://img33.imageshack.us/img33/8236/waveeq.jpg [Broken] 3. The attempt at a solution We calculate second differential with respect to x, and t, substitute into the wave equation. We then equate the coefficients: [A''(x) + (w/v)^2A(x)]sin(wt)=0 We know from SHM equation that: A''(x) = -(w/v)^2A(x), and hence A''(x) = -k^2 A(x) But where do we go from here? Any hints? Also, what about part b?