Let's do a "quickie" review. View the slide presentation -The Unit Circle
To help you remember where the trig functions are positive, store this in your memory bank...
Q1 - All (for ALL functions)
Q2 - Students (S for Sine)
Q3 - Take (T for Tangent)
Q4 - Calculus (C for Cosine)
All Students Take Calculus
All Sine Tangent Cosine