Trigonometry Tango!

[Deek2]

Hello,
I have recently been interested in developing a script that uses an attractive gravitational force that spins nearby players towards yourself in a vortex spiral direction. I am merely interested in the mathematical concepts/equations relevant to achieve this. I would prefer to work out the nuts and bolts by myself, since I am inexperienced in the gscript language.
Oh, woe! If only I weren't mathematically inept (I haven't even started Geometry yet!).
Observe this visual aid: