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Homework Help: Write a Parametric equation

  1. Jun 9, 2009 #1
    Write a pair of parametric equations for the figure whose rectangular equation is

    please help me
  2. jcsd
  3. Jun 9, 2009 #2


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    Homework Helper

    Compare it to the equation [itex]x^2+y^2=1[/itex] which is almost the same. Does this equation look familiar? Do you what kind of geometric figure it represents? Can you find a parametrization for this simplified problem?
  4. Jun 9, 2009 #3
    Hi i am sorry but i still dont understand this. Is there anyway you can make it simpler.
  5. Jun 9, 2009 #4


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    Here is a clue

    if sin2x+cos22=1

    and you divide throughout by cos2x, what do you get?
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