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Parametric equation

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  • 14-05-2009 1:54pm
    #1
    Iwasfrozen
    Registered Users Posts: 16,250 ✭✭✭✭


    What procedure should be followed when trying to find the parametric equation of a curve when only given two points ?


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    #2
    waraf
    Closed Accounts Posts: 1,326 ✭✭✭waraf


    Dunno if this is any help to you....

    http://ltcconline.net/greenl/courses/107/PolarParam/parameq.htm


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    #3
    LeixlipRed
    Closed Accounts Posts: 6,081 ✭✭✭LeixlipRed


    Well it depends on what type of curve it is. Is it a straight line? A parabola, etc,?


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    #4
    Iwasfrozen
    Registered Users Posts: 16,250 ✭✭✭✭Iwasfrozen


    I'm not exactly sure but I assume parabola.
    Heres the exact question.
    The Parametric Eqautions of a curve are :
    X=In(1+t^2) and Y=In2t Where tER, t>0
    Find the Value of dy over dx when t=(5)^1over2


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    #5
    LeixlipRed
    Closed Accounts Posts: 6,081 ✭✭✭LeixlipRed


    It's not a parabola. In fact, you don't need to parameterise anything there as it's already done for you. To calculate dy/dx you neet to calculate dx/dt and dy/dt and then dy/dx = (dy/dt)(dt/dx).


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    #6
    Iwasfrozen
    Registered Users Posts: 16,250 ✭✭✭✭Iwasfrozen


    Thats it ?
    Wow thats easy. It's just the Termonology that had thrown me off.


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