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.
The following diagrams give the exact values on the unit circle (degrees and radians). Scroll down the page for various tips and tricks on how to remember the values.
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.
Unit Circle Hand Trick
A Finger Trick for Trigonometry
If we insist that students memorize the values of sine and cosine for the basic angles 0, 30, 45, 60 and 90 degrees, then here's a cute little trick for doing so using the fingers on your hand.
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