Posted by **Don** on Tuesday, December 20, 2011 at 9:57pm.

cot (tan + cot) = ?

- Trig -
**Damon**, Wednesday, December 21, 2011 at 5:18am
1 + cot^2

- Trig -
**Steve**, Wednesday, December 21, 2011 at 11:21am
= csc^2

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