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Thread: How to draw a circle using TI 89

  1. #1
    Join Date
    Feb 2009
    Posts
    56

    How to draw a circle using TI 89

    hi,

    I want to ask a simple question about TI 89 (Texas Instruments 89). How can I draw a circle using TI 89. Can anybody please suggest some useful tips regarding this......thanks

  2. #2
    Join Date
    May 2008
    Posts
    4,345

    Re: How to draw a circle using TI 89

    I think that the scientific calculators are capable of carrying out functions in the form : y = f(x) ...so you need to obtain the explicit form of the function as given in the following form -

    (x^2 - 8x) + (y^2 - 12y) = -36

    (x^2 - 8x + 10) + (y^2 - 12y + 32) = -36 + 10 + 32

    (x-8)^2 + (y-12)^2 = 14

    y - 12 = ± square root((14 - (x-8)^2))

    y = 12 ± square root((14 - (x-8)^2))

    These are the two functions you need to combine to form your circle.

    all the best

  3. #3
    Join Date
    May 2008
    Posts
    4,570

    Re: How to draw a circle using TI 89

    Whatever your equation is ? You first need to evaluate that equation in terms of 'Y' and then simply put the appropriate values (normally integers) into the TI 89 application, you 'll get the required result.

  4. #4
    Join Date
    May 2008
    Posts
    3,316

    Re: How to draw a circle using TI 89

    Circles are not the functions. You will require the separate conics program to simplify the equation in terms of the required format so that you can easily enter the values.

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