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Hand trick to help high school students remember the unit circle - works for left or right-handed students.

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Full explanation Hand unit circle - I might mirror it on my right hand instead so that my cosine is on the left and sine is on the right.

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Calculus for Beginners and Artists is an online textbook that provides an overview of Calculus in clear, easy to understand language designed for the non-mathematician. Thank you MIT OpenCourseWare for awesome, free resources and classes!!!

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I taught the Unit Circle in half the time with twice the retention with this trick! Great supplement to teaching the special triangles!

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A useful way to remember sin(30), sin(45), sin(60): think "1, 2, 3"; cos(30), cos(45), cos(60): think "3, 2, 1" |

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