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March 1, 2015

Posted by **Jesssica** on Tuesday, December 6, 2011 at 10:07pm.

sec^4x + (tan^2x)(sec^2x)= sec^4x

- Pre-Cal -
**Anonymous**, Wednesday, December 7, 2011 at 6:43amThere must be a typo somewhere. If you subtract sec^4x from both sides, you have

tan^2x * sec^2x = 0

which is not always true.

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