A downloadable demonstration of the sine, cosine, and tangent ratios for right triangles. The download contains ActiveX controls, which may not load on some school networks. (
http://demonstrations.wolfram.com/SOHCAHTOATriangle/
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A downloadable demonstration of the sine law. The download contains ActiveX controls, which may not load on some school networks. (
http://demonstrations.wolfram.com/TheLawOfSines/
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At the bottom of this page is an interactive applet which gives a visual proof of the cosine law (and shows its relation to the Pythagorean Theorem in the process). (
http://www.ies.co.jp/math/java/trig/yogen_auto/yogen_auto.html
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