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February 1, 2015

February 1, 2015

Posted by **Anonymous** on Sunday, June 17, 2012 at 5:31pm.

- Math -
**Steve**, Monday, June 18, 2012 at 12:24amyou have a 2-√21-5 triangle, so in QIV, you have

cos = 2/5

csc = -5/√21

cot = cos*csc = -2/√21

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