1. The problem statement, all variables and given/known data I have a problem that asks to derive the doppler effect for the two different cases of a moving observer and a moving source. 2. Relevant 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. 3. 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?