Your trigonometry students will love this self-checking circuit which requires them to refer to the unit circle. Aids in memorizing the unit circle. 32 questions total. May be used cooperatively, as homework, or even as a quiz! May be converted to a scavenger hunt. Great for ACT / SAT review.
My colleagues and I check our work very carefully but if you ever get stuck, please don't hesitate to contact me at firstname.lastname@example.org.