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April 21, 2015

April 21, 2015

Posted by **stacey graham** on Friday, March 26, 2010 at 12:18am.

sec(beta)+ tan (beta)= cos(beta)/ 1-sin(beta)

- trig -
**drwls**, Friday, March 26, 2010 at 2:44amThe left side can be rewritten

= (1 + sin theta]/cos theta

Crossmultiply

cos^2 theta = 1 - sin^2 theta

That is an identity

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