Results 1 to 2 of 2

Math Help - Graphing Polar Equations:

  1. #1
    Junior Member
    Joined
    May 2009
    Posts
    39

    Graphing Polar Equations:

    I don't seem to get how to graph them. Currently trying to understand how to graph: r = 3cos(2X)
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member craig's Avatar
    Joined
    Apr 2008
    Posts
    748
    Thanks
    1
    Awards
    1
    Quote Originally Posted by Neversh View Post
    I don't seem to get how to graph them. Currently trying to understand how to graph: r = 3cos(2X)
    When graphing polar coordinates it's important to remember that r is the length of the line, and x is the angle in radians, measured anti-clockwise from the positive "x-axis".

    What I do is use values for x such as 0, \frac{\pi}{8}, \frac{\pi}{4}, \frac{3\pi}{8} etc, and plot the r values that these give me.

    When I have a good amount of points I then join them up. Remember your graphs will most likely be circles or spirals.

    Also a graphic calculator is invaluable for graphing polar coordinates if you have one.
    Last edited by mr fantastic; June 9th 2009 at 12:09 AM. Reason: Merged posts
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Graphing a polar equation?
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: April 19th 2011, 05:19 PM
  2. Graphing Polar Coordinates
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: May 25th 2010, 12:09 AM
  3. Polar Graphing
    Posted in the Trigonometry Forum
    Replies: 3
    Last Post: October 19th 2009, 05:34 AM
  4. Graphing Polar Equations question
    Posted in the Pre-Calculus Forum
    Replies: 3
    Last Post: January 22nd 2009, 12:38 AM
  5. Graphing Polar Equations
    Posted in the Pre-Calculus Forum
    Replies: 3
    Last Post: September 27th 2008, 10:45 PM

Search Tags


/mathhelpforum @mathhelpforum