yup..
its a normal sin curve except:
the amplitude (the height) is 3 so the tip and bott0m of the curve goes to 3 and -3.
[the domain:
-theta=<x-theta/2=<theta
-2theta=<2x-theta=<2theta
-theta=<2x=<3theta
-theta/2=<x=<3theta
] er...i dont think what i just typed for the domain is...