1. The problem statement, all variables and given/known data I have a graph of two sinusoids which I need to find the frequency of and phase difference between the two. I have the frequency easily enough, I hope, and I found what I believe is the actual formula for each wave. But I have no clue as to finding the difference. 2. Relevant equations Frequency V1(t) = 250Hz (period of 4mS) V2(t)=333.33Hz (period of 3mS) I have the following formulas for the waves. V1(t)=4Vcos(2pi250t + pi/3) V2(t)=-3Vcos(2pi333.33t) 3. The attempt at a solution From here, the textbook is blank. Is the difference just simply pi/3? And does it matter that the waves have different peak heights? Any and all help is appreciated.