Results 1 to 4 of 4

Math Help - how do I get my TI-89 to solve for this equation?

  1. #1
    Newbie
    Joined
    Mar 2008
    Posts
    2

    how do I get my TI-89 to solve for this equation?

    How do I get my Ti-89 to solve 2cosx+1=0
    and cos^3x=cosx ? Any help will be apreciated.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Eater of Worlds
    galactus's Avatar
    Joined
    Jul 2006
    From
    Chaneysville, PA
    Posts
    3,001
    Thanks
    1
    Press F2 and then 'solve'.

    Here's a screen capture from my TI-92. It works the same.

    The @n1 symbol represents a constant we can call c.

    If you enter an integer value for this, then we have a solution which satisfies the equation.

    If c=0, then we have \frac{2\pi}{3}, \;\ \frac{-2\pi}{3}

    If c=1, then we have \frac{8\pi}{3}, \;\ \frac{4\pi}{3}

    and so forth.
    Last edited by galactus; November 24th 2008 at 06:38 AM.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Mar 2008
    Posts
    2

    hmmm

    how do I change the constant?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Super Member
    earboth's Avatar
    Joined
    Jan 2006
    From
    Germany
    Posts
    5,830
    Thanks
    123
    Quote Originally Posted by SRGTLORD View Post
    how do I change the constant?
    Do you want to use numbers instead of @n1 ? If so:

    1. Place the cursor into the line with the results: The results are marked up
    2. Press ENTER: The line is copied into the edit line
    3. Now you can alter every entry in this line
    Attached Thumbnails Attached Thumbnails how do I get my TI-89 to solve for this equation?-var_uberschreiben.gif  
    Last edited by earboth; March 20th 2008 at 03:29 AM.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. [SOLVED] Solve Differential equation for the original equation
    Posted in the Differential Equations Forum
    Replies: 5
    Last Post: February 21st 2011, 02:24 PM
  2. need to solve summation equation to solve sum(x2)
    Posted in the Statistics Forum
    Replies: 2
    Last Post: July 16th 2010, 11:29 PM
  3. How to solve this equation
    Posted in the Algebra Forum
    Replies: 4
    Last Post: December 8th 2009, 06:45 AM
  4. solve this equation for x
    Posted in the Algebra Forum
    Replies: 2
    Last Post: January 26th 2009, 05:50 AM
  5. Replies: 13
    Last Post: May 19th 2008, 09:56 AM

Search Tags


/mathhelpforum @mathhelpforum