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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! http://geometrycoach.com/the-unit-circle-hand-trick/

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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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