Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Parametric equation

  1. Oct 2, 2011 #1
    Generally with parametric equations to determine the direction that the line or curve is traveling in, how can you be sure as to what direction it goes in? When you plot points, how do you know if its going from the left or to the right increasing, are they asking if the x values are increasing, or are they asking if what you get out of the function is increasing in order to determine what direction it's traveling in?


    Is this right?
    Question is: graph the parametric equation: x=2cost , y=2sint

    x/2 = cost

    the graph is a circle of radius 4 correct?

    If done properly what direction will the curve be traveling in?
  2. jcsd
  3. Oct 2, 2011 #2
    Radius =2.
    Give values to t, starting from 0 and see how the curve goes.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook