Question about Texas Instruments TI-89 Calculator

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TI-89 Problems When i go to do a cos, tan, sin function or add an exponent (ie. 2^2) the calculator wont answer me. It just repeats what i have typed into it on the main screen without actually doing the tan function or squaring the number. Please help me. Is there something i need to change in the settings? Basically it just wont solve things and repeats what i have typed in right back to me. Basic functions like plus and minus work but that is about it.

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Re: TI-89 Problems

There isn't anything "wrong" with it.

Go to mode, and set the results of your inquiries from Exact to approx.

If you put in cos(e^2), it will print out cos(e^2) because it's the most exact it can be without going into a decimal. (cos(e^2) will be a transcendental number like Pi).

Posted on Dec 21, 2008

Re: TI-89 Problems

Go into mode and scroll down to exact/approximate.The sin/cos etc functions will give you an exact answer, unless you set it to approximate which is what I am guessing you are looking for.

Posted on Sep 11, 2007

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Hi danagasta,

If my last instructions did not work then you need to reset your RAM. You are missing the negative sign and, I have no idea where you got the absolute value inside the brackets.
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