Results 1 to 3 of 3

Thread: parametric equations

  1. #1
    Newbie
    Joined
    Jan 2007
    Posts
    3

    parametric equations

    I need help with parametric equations....i can't seem to figure out where to start when looking at a problem. The problems i will have to solve include looked at a diagram and figuring out the parametric equations for the trace of a movie point. Any suggestions?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Global Moderator

    Joined
    Nov 2005
    From
    New York City
    Posts
    10,616
    Thanks
    10
    Quote Originally Posted by sarah s View Post
    I need help with parametric equations....i can't seem to figure out where to start when looking at a problem. The problems i will have to solve include looked at a diagram and figuring out the parametric equations for the trace of a movie point. Any suggestions?
    Give a problem that you are unable to do.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Forum Admin topsquark's Avatar
    Joined
    Jan 2006
    From
    Wellsville, NY
    Posts
    11,152
    Thanks
    731
    Awards
    1
    Quote Originally Posted by sarah s View Post
    I need help with parametric equations....i can't seem to figure out where to start when looking at a problem. The problems i will have to solve include looked at a diagram and figuring out the parametric equations for the trace of a movie point. Any suggestions?
    If I am understanding what you have to do correctly the I would suggest the following scheme:

    Set the lower left corner of the screen as (0, 0). Then you can think of your trace as a series of coordinate points. Pick a starting point for your trace and call this t = 0. Call the coordinates of that point $\displaystyle (x(0), y(0))$.

    Now pick a small distance along the path, small enough that the path is (roughly) a straight line over that distance. Record the coordinates of that point as $\displaystyle (x(1), y(1))$.

    Using the same distance, find the coordinates of the next point, $\displaystyle (x(2), y(2))$. etc.

    So you will have a list of coordinate points at "equal spacings" along the trace.

    Now find a best fit function for the x - coordinates, and a separate best fit function for the y - coordinates. This will be your parametric representation of the trace.

    -Dan
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. parametric equations, equations of plane
    Posted in the Calculus Forum
    Replies: 1
    Last Post: Sep 10th 2009, 02:58 AM
  2. Parametric equations to rectangular equations.
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: Apr 5th 2009, 10:39 PM
  3. Parametric equations
    Posted in the Calculus Forum
    Replies: 1
    Last Post: Mar 15th 2009, 02:18 PM
  4. Replies: 3
    Last Post: Dec 2nd 2008, 10:54 AM
  5. Replies: 1
    Last Post: Sep 1st 2007, 06:35 AM

Search Tags


/mathhelpforum @mathhelpforum