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March 26, 2017

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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 - ,

    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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