...and here are some other links that may be useful Scanned homework for 1.3 and 1.5 (Poor quality, but legible when printed) Solving Quadratic Equations:  How do I decide which method to use? Piecewise Functions:  Extra problems Graphing Calculator Help Page         Identity "Brain Drain" Blank Unit Circle         Unit Circle Memory Aid Trig Functions of Special Angles:   MS Word   or   Adobe Homework problems for the semester (note: these can change at the whim of your instructor)