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Math Trick to remember the Unit Circle and Trig Ratio

The following videos show some a math trick to help you remember the values of a unit circle and Trig Ratio of Special Angles: 0, 30, 45, 60, 90

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 Finger Trick for Trigonometry
If we insist that students memorise 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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