Question about Texas Instruments TI-89 Calculator

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Hi, I recently purchased a ti 89 calculator from a friend and I am having the following problem: The calculator will not evaluate trig functions. For example, if I type Sin(Pie/4) and hit enter, the calculator says Sin(pie/4) as the answer.

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The calculator is set up to produce exact results. If you want the expression to be evaluated put a decimal mark at the end of the 4.
to making 4 a floating point number instead of integer.
Alternatively, press the [MODE] key. Scroll down through the pages of options until you reach the line labeled Exact/Approx. When cursor is on that line, use the right arrow key to open the menu. Select [3:Approximate]. Press [ENTER] to save.

Posted on Aug 25, 2010

  • k24674 Aug 25, 2010

    OOPS "to making 4 a floating point number instead of integer." should read "to make 4 a floating point number instead of integer."

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60131ab.jpg

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