Trigonometry Function Animations
http://www.absorblearning.com/media/attachment.action?quick=je&att=1388
http://www.mathdemos.org/mathdemos/family_of_functions/trig_gallery.html
http://www.jasondavies.com/animated-trig/
http://sciemathematics.wikispaces.com/Trigonometry+Animations
http://clem.mscd.edu/~talmanl/MathAnim.html
http://www.math.utah.edu/~palais/cossin.html
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http://www.mathdemos.org/mathdemos/family_of_functions/trig_gallery.html
http://www.jasondavies.com/animated-trig/
http://sciemathematics.wikispaces.com/Trigonometry+Animations
http://clem.mscd.edu/~talmanl/MathAnim.html
http://www.math.utah.edu/~palais/cossin.html
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Calculus Made Simple
A sassy, easy to understand explanation of calculus published in 1914: Calculus Made Simple by Silvanus P. Thompson