Finding the phase angle in a cosine wave equation

[NAkid]

Homework Statement

How do you find the phase angle of a wave equation given in the form

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

thanks

Homework Equations

The Attempt at a Solution

 

[Snazzy]

The general equation for a wave is

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

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