C.A.S.T. Rule Math 30?

How do you determine the quadrant theat will be in using the C.A.S.T. Rule?

C.A.S.T. Rule Math 30?
I never heard it as CAST, as I'm used to All Suckers Take Chemistry. But using CAST, the idea is that the quadrants are labeled starting from the lower right hand corner.


S|A


--|--


T|C


C = Cos is positive, sin and tan are negative


A = All are positive


S = Sin is positive, cos and tan are negative


T = Tan is positive, sin and cos are negative