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May 30, 2016
Posted by **Ama** on Tuesday, November 13, 2012 at 7:39am.

csc t − sin t/csc t= cos2 t

- precalculus -
**Damon**, Tuesday, November 13, 2012 at 8:12amYou are missing a parenthesis !!!

I assume that you mean:

(csc t - sin t)/csc t

(1/sin t - sin t) /(1/sin t)

(1 - sin^2 t) / 1

cos^2 t