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April 18, 2015

April 18, 2015

Posted by **Anonymous** on Friday, March 23, 2012 at 11:01am.

- precal -
**Steve**, Friday, March 23, 2012 at 11:44amsec/sin = 1/sin*cos

1/sin*cos - sin^2/sin*cos

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

= cos^2/sin*cos

= cos/sin

= cot

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