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February 1, 2015

February 1, 2015

Posted by **Shane** on Monday, May 6, 2013 at 4:26pm.

- maths -
**Steve**, Monday, May 6, 2013 at 4:43pmsince cot = cos/sin,

sin cot = sin * cos/sin = cos

expand the two tan expressions and recall that

sec^2 = 1 + tan^2

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