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December 17, 2014

December 17, 2014

Posted by **Don** on Tuesday, December 20, 2011 at 9:56pm.

- Trig -
**Damon**, Wednesday, December 21, 2011 at 5:15amsec^2 -1

1/cos^2 - 1

1/cos^2 - cos^2/cos^2

sin^2/cos^2

tan^2

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