Well, I am confused, too. What do you mean "what is the relation"?
x is unknown; y is unknown==> relation is unknown.
The phase difference between the two waves is 2x-y. Is that significant?
Actually, you seem to be missing something. If x and y are constants, your two signals are also constants. Is there supposed to be a "t" in there somewhere?
x and y are angle variables (say theta and alpha) so take x=w*t = 2*pi*f1*t and y =2*pi*f2*t
how do i find the phase difference 2x-y = ? , need two equation, for x and y but i only need their relation so what i am looking for is relation like this 2x-y = pi, then y =2x-pi for example
so i am looking for phase difference value given that the one wave makes 1 cycle in 2pi period and another wave makes 2 cycle in 2pi period
i am not clear what i need to know to find phase difference