Basic Trigonometry
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Introduction to trigonometry
More free lessons at: http://www.khanacademy.org/video?v=Jsiy4TxgIME
More free lessons at: http://www.khanacademy.org/video?v=Jsiy4TxgIME
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![Pythagoras Would Be Proud: High School Students' New Proof of the Pythagorean Theorem [TRIGONOMETRY]](https://i.ytimg.com/vi/p6j2nZKwf20/mqdefault.jpg)
