1. The problem statement, all variables and given/known data 1. The problem statement, all variables and given/known data The displacement y of standing wave that is obtained by a superposition of waves : Y1 = 3 sin (2##\pi##(0.5t - 0 25 x)) Y2 = 3 sin (2##\pi##(0.5t + 0 25 x)) 2. Relevant equations Formula for standing waves Y = 2Asinkx coswt 3. The attempt at a solution Y1 going to right Y2 going to left Both have different direction. How to decide it is constructive or destructive interference? Are they longitudinal or transverse waves? Does it matter? How to know in the new equation, which belong to sin x or t variable, which belong to cos?