Homework Help: Pre-Cal

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

I'm trying to do this identities homework and i can't figure this one out.
sec^4x + (tan^2x)(sec^2x)= sec^4x

Pre-Cal - Anonymous, Wednesday, December 7, 2011 at 6:43am
There 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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