How Do You Derive the Doppler Effect for Moving Observers and Sources?

[tjaeger]

Homework Statement

I have a problem that asks to derive the doppler effect for the two different cases of a moving observer and a moving source.

Homework Equations

I should get f' = f*(v +/- vo)/(v +/- vs) as my general equation, where f' is the observed frequency and f is the frequency of the wave.

The Attempt at a Solution

I wish I had more work to show, but I'm not really sure how to derive formulas. Where should I begin?

 

[tjaeger]

Nevermind, I figured it out. Wavelength changes with a moving source and velocity of the sound wrt the observer changes when the observer is moving.