Posted by **maria** on Wednesday, July 13, 2011 at 9:18am.

Verify that each trigonometric equation is an identity tan^2+1/sec Î± =sec Î±

- algebra/trignometry -
**Reiny**, Wednesday, July 13, 2011 at 9:35am
Please check with your previous post before re-posting the same question.

http://www.jiskha.com/display.cgi?id=1310559328

- algebra/trignometry -
**kathy**, Wednesday, July 13, 2011 at 9:54am
x=-16 ,y=17 when x squared -4y squared

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