The point (40,-9) is on the terminal arm of Angle A. What is the set of exact primary trigonometric ratios for the angle?
Select-one: Oa. sinA = -4/41, cosA = 40/41, tanA = -9/40
Ob. sinA = cosA = tanA = 1
Oc. sinA = -cosA = -tanA
Od. sinA = -cosA = tanA