Introduction to Cosine & Tangent

Translation of [url]33112 Introduce to Cosine and Tangent[/url] by alexchik (http://www.geogebratube.org/user/profile/id/4422 ). [b]GeoGebra Institute of Hong Kong[/b] https://sites.google.com/site/hkgeogebra/ http://www.facebook.com/hkggb email: [b]geogebra.hk@gmail.com[/b]

 
 
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