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Math, Please Help!!!

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How can the right equation be converted into the answer on the left?

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

  • Math, Please Help!!! -

    RS = tan^2x(1 + tan^2x)(sec^2x)
    = tan^2x(sec^2x)(sec^2x) , because 1 + tan^2x = sec^2x
    = tan^2x(sec^4x)
    = LS

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