# Homework Help: General question about wave equation

1. Apr 6, 2008

### NAkid

1. The problem statement, all variables and given/known data
How do you find the phase angle of a wave equation given in the form

y(x,t) = Acos(kx - wt)

thanks

2. Relevant equations

3. The attempt at a solution

2. Apr 6, 2008

### Snazzy

The general equation for a wave is

$$y(x,t) = Acos(kx - \omega t +\phi)$$

I'm assuming $$\phi$$ is what you want.