Question about Texas Instruments TI-89 Calculator

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I am trying to find the integral to x*sinx on my ti-89 but everytime I get an argument error message. Is there a different x button other than the obvious big white x button?

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Hello,
Here is a screen capture of the integral.

i am trying to find the integral to x*sinx on my - 1546ae2.jpg
The dummy variable x may contain some previously defined value. Clear old values . In Home folder [2nd][F6: Clean Up][ 1:Clear a-z] [ENTER][ENTER] or [2:NewProb][ENTER][ENTER]
Make sure you insert the multiplication sign. And do not forget to put the argument x of the function inside parentheses.
Hope it helps.

Posted on Sep 30, 2009

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1 Answer

TI-89 dimension mistmatch error


Dimension mismatch error occurs when arguments are not with same dimensions. Two or more arguments must be of the same dimension. For example, [1,2]+[1,2,3] is a dimension mismatch because the matrices contain a different number of elements. By the way, it it very easy to resolving your problem with differentiation. See captured image


2_23_2012_9_41_18_am.jpg

As a result of differentiation you had to obtained:

(3b+2c)cos2x+(3c-2b)(sin2x)e^(3x)+2ae^(2x)

Feb 23, 2012 | Texas Instruments TI-89 Calculator

1 Answer

TI-89 dimension mistmatch error


Dimension mismatch error occurs when arguments are not with same dimensions. Two or more arguments must be of the same dimension. For example, [1,2]+[1,2,3] is a dimension mismatch because the matrices contain a different number of elements. By the way, it it very easy to resolving your problem with differentiation. See captured image

2_23_2012_9_31_10_am.jpg

As a result of differentiation you had to obtained:

(3b+2c)cos2x+(3c-2b)(sin2x)e^(3x)+2ae^(2x)

Feb 23, 2012 | Texas Instruments TI-89 Calculator

1 Answer

I am trying to get the answer to an indefinite integral. I keep getting "argument error" For example, I type in after the integral sign: (sin(x),x) and get the error message. Help!


You already have something stored with the name x. Either get rid of it or use a different name for the variable of integration.

You can see what variables you have stored by pressing 2ND [VAR-LINK] (the minus key).

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I keep getting undefined variable error when i try to graph


Hello,
The default variable for the integral is x. If you have a product between two litteral symbols the * must be inserted. Arguments of functions must be enclosed between parentheses. To avoid errors clear the variables before the integration: [2nd][F6:Clean Up] [2:NewProb][ENTER]ENTER]

753b9af.jpg

Hope it helps.


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I reset my calculator and this solved the problem. To reset your calculator press [2nd], then [6] (Mem), press F1 (reset), Select 3 for all memory, and select Yes.

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I reset the calculator and it did its job- though a solution would be handy.

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