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-   -   Polar notation (https://www.askmehelpdesk.com/showthread.php?t=366229)

  • Jun 17, 2009, 08:46 PM
    caroash09
    polar notation
    create a tabel of values for r and θ for the function r=3/cos(θ) on the interval -pie/2<θ<pie/2 and graph this polar function.



    I did so much try... I did half... but does not seems right.. someone can help me soon...
  • Jun 17, 2009, 09:12 PM
    Unknown008

    Find your reference points by replacing in values of theta.

    First, , 0 then . You should also try , , . Afterwards, the positive values.
  • Jun 17, 2009, 10:29 PM
    caroash09

    I know.. I tried it but could not abel make a tabel... help soon
  • Jun 18, 2009, 05:59 AM
    galactus
    'Pie'? Please, don't do that.:rolleyes:
  • Jun 18, 2009, 06:03 AM
    Perito
    Quote:

    create a table of values for r and θ for the function r=3/cos(θ) on the interval -pi/2<θ<pi/2 and graph this polar function.

    i did so much try. I did half.
    What "half" did you try? This is very, very easy. Don't make it harder than it should. All you need is two columns. Under one column, select and enter values of θ. You get to choose them. Unknown008 showed you values to select. Start with negative values, go to positive values. The r column is for values of r that you calculate. Once you have the points, put them on a polar graph.

    and is spelled "pi", not "pie".
  • Jun 18, 2009, 08:14 AM
    Unknown008
    Oops, I thought it was a simple sec curve :o
  • Jun 18, 2009, 08:29 AM
    galactus
    1 Attachment(s)
    Here is the graph of 3sec(t) in polar. It is little more than a vertical line.

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