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Parameter equation

  1. Nov 27, 2007 #1
    1. The problem statement, all variables and given/known data

    How can I eliminate tha parameter of these equations:
    x=sec x, y=tan x

    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Nov 27, 2007 #2

    Dick

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    Square them and subtract.
     
  4. Nov 28, 2007 #3

    HallsofIvy

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    You can't if there is NO parameter. I assume you meant x= sec t, y= tan t. As Dick said, square and subtract- you are using a simple trig identity.
     
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