From the information given, find the quadrant in which the terminal point
determined by t lies. Input I, II, III, or IV.
(a) sin(t)<0 and cos(t)<0, quadrant ;
(b) sin(t)>0 and cos(t)<0, quadrant ;
(c) sin(t)>0 and cos(t)>0, quadrant ;
(d) sin(t)<0 and cos(t)>0, quadrant ;