Use your hand as an easy way to remember and memorize the unit circle.
Start at Quadrant 1 of the Unit Circle
The first coordinate is always Cosine and then Sine
Starting at your thumb, each finger will have a square root and a degree. The thumb will be 90 degrees, and the other fingers will be 60 degrees,45 degrees, 30 degrees,ending with your pinky being 0 degrees
Which ever finger you fold, the number of fingers above the finger will tell you the number of square roots which represents the first coordinate.
The number of fingers below the folded finger represents the sine.
Repeat this for each finger, and you will have quadrant 1 of the unit circle.
Part 2 of this video
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