The terminal ray of angle θ drawn in standard position passes through (2,−3).
What is the value of cscθ?
(x , y) = (2, -3)
r = sqrt [ 2^2 + (-3)^2] = sqrt [ 4 +9] = sqrt (13)
csc θ = r / y = sqrt (13) / -3 = - sqrt (13) / 3
+32 
