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Parametric homework

  1. Feb 23, 2010 #1
    x=tan(t)+sec(t) and y=tan(t)-sec(t)

    I have to take the derivative, but it specifically states that I must eliminate the Parametric to do so (I think as a way to check we can do this...oops)

    I was thinking that I could turn the x into:
    x=sint+1/cost and then I could go from there, the only problem is that I have no idea where to go.

    If anyone has any ideas that would help me get this into a trig identity so I can solve for t, I would love it!
  2. jcsd
  3. Feb 23, 2010 #2


    Staff: Mentor

    Re: parametric

    xy = ?
    It's also helpful to know a few trig identities involving secant and tangent.
  4. Feb 23, 2010 #3
    Re: parametric

    you can do that?
  5. Feb 23, 2010 #4


    Staff: Mentor

    Re: parametric

    Sure, why not?
  6. Feb 23, 2010 #5
    Re: parametric


    good call. Thank you soooooooo much!
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