Patrick B. answered 09/15/20
Math and computer tutor/teacher
A: All trig functions positive in quadrant 1
S: sine function positive in quadrant 2
T: tangent function positive in quadrant 3
C cosine function positive in quadrant 4
csc < 0
1/sin < 0
so sin <0
sec >0
1/cos >0
so cos >0
quadrant 4