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from Business Insider

7 Animated GIFs That Will Make You Instantly Understand Trigonometry

7 Animated GIFs That Will Make You Instantly Understand Trigonometry http://www.businessinsider.com/7-gifs-trigonometry-sine-cosine-2013-5

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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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