The following videos show some math tricks to help you remember the values of a unit circle and Trig Ratio of Special Angles in degrees (0, 30, 45, 60, 90) and also in radians.
More Lessons on Trigonometry
A Trick to Remember Values on The Unit Circle
People often forget what x,y coordinates on the unit circle go with what angle. This video shows a little 'trick' to remember the values on the unit circle in the first quadrant.
A Way to remember the Entire Unit Circle for Trigonometry
The Unit Circle Values from Zero to a quarter of Pi or an eigth of the Pie.
Resist the temptation to learn the unit circle as a whole. Learn it the first one eight of the way around and practice using a reflection, and then another reflection and then another reflection.
How to remember the values on a unit circle
Explanation of an easy trick for memorizing the values of the unit circle
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