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March 28, 2015

March 28, 2015

Posted by **CYNTHIA** on Thursday, November 20, 2008 at 8:39pm.

- trig -
**drwls**, Thursday, November 20, 2008 at 8:46pmcot^2x - csc^2x

= (cos^2x -1)/sin^2x

= -sin^2x/sin^2x = -1

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