# Standing Waves Formula Question

1. Dec 6, 2008

### jessedevin

1. The problem statement, all variables and given/known data
In the equation describing the superposition of the two waves to obtain a standing wave, which term represents the wave propagating to the left?

2. Relevant equations

Y(x,t) = Asin2$$\pi$$(t/T - x/$$\lambda$$) + Asin2$$\pi$$(t/T +x/$$\lambda$$)

3. The attempt at a solution
I think its Asin2$$\pi$$(t/T +x/$$\lambda$$) because I remember in math that the + in the sin wave will shift it towards the left, but im not sure. FYI:
T= Tension
t= rime
A= amplitude
$$\lambda$$= wave length
x=distance

2. Dec 6, 2008

### turin

Sounds good to me. Do you know calculus? You can also check the sign of
$$v = \frac{\frac{\partial{Y}}{\partial{t}}}{\frac{\partial{Y}}{\partial{x}}}$$