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The following videos may help during the current Unit:
http://www.khanacademy.org/video/using-trig-functions?playlist=Trigonometry
http://www.khanacademy.org/video/45-45-90-triangles?playlist=Geometry
http://www.khanacademy.org/video/intro-to-30-60-90-triangles?playlist=Geometry
http://www.khanacademy.org/video/30-60-90-triangles-ii?playlist=Geometry
http://www.khanacademy.org/video/basic-trigonometry-ii?playlist=Trigonometry
http://www.khanacademy.org/video/using-trig-functions?playlist=Trigonometry