1. The problem statement, all variables and given/known data Hello everyone, I am stuck with a basic concept.How do we can recognize if a given equation is wave or not?For example we know that the standing waves equation is y=2Acos(kx)sin(ωt). In my text book there is a problem which says that two waves having only different amplitudes are traveling on opposite directions on x-axis. They have asked if the waves form standing waves. 2. Relevant equations 3. The attempt at a solution First of all i wrote the following equations. y1=A1sin(kx-ωt) ; y1=A2sin(kx+ωt) i added them and got y1+y2= (A2+A1)sin(kx)cos(ωt)+(A2-A1)coskxsinωt how do i recognize if this equation represents a standing wave or not??