Question about Texas Instruments TI-89 Calculator

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Problem entering matrices - only the working out step is shown

When I try to enter a matrix, something like this: [8,9;7,1], and click enter, where the matrix should look like a correct matrix, it's just the working out steps and there's another set of square brackets. This also happens when I try to do something like square root of square root of 61 squared + 15 squared. I click enter and the working step is just showed - you can see this symbol (^) and heaps of brackets instead of a proper equation.

I've tried resetting and comparing my modes to numerous teachers and students but no one can figure it out.

Please help!

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  • readnl Nov 13, 2008

    nope - that doesn't work. it'll just put it in approximate mode.

    thanks anyway

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Try hitting the diamond button and then hitting answer after it shows up, it should give you a different outcome than the original. hope that helped.

Posted on Nov 12, 2008

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1 Answer

Matrix addition, subtraction


There should not be any problem. There is however something you did not talk about. After you finish entering the coefficient of the second matrix (mat B) you should press the AC key. This way you exit the matrix editing utility.
Once the matrices are entered and saved,
Press [SHIFT][4] (Matrix)
Press 3: MatA
The label MatA appears on the screen.
Pres [+]
Press [SHIFT][4] (Matrix)
Press 4: MatB
At this point your screen shows MatA+MatB
Press [=] to get the result
[ [-36 , -92], [-69,-17],[-63, -71]]

Dec 03, 2013 | Casio FX-115ES Scientific Calculator

1 Answer

How to enter the matrix


Open the ScratchPad/calculator application then press MENU.

k24674_135.jpg

Use arrows to highlight Matrix/Vector or just press 7

k24674_136.jpg

Press 1 Create then 1:Matrix
k24674_137.jpg

Choose/Enter the dimensions.

k24674_139.jpg
Highlight the OK button and press ENTER. The screen displays a template of your matrix.

k24674_138.jpg

Enter matrix coefficients.
k24674_141.jpg

If you plan on doing something with the matrix, you have to give it a label (name).
k24674_142.jpg

Aug 28, 2011 | Texas Instruments TI-Nspire Graphic...

1 Answer

How to compute a matrix


  1. First you must set Matrix calculation: Press [MODE][6:Matrix].
  2. Then by entering one of the numbers [1:MatA] or [2:Matb] or [3:MatC] you get to choose the dimensions of the matrix (mxn].
  3. Once finished entering the matrix you clear the screen.
  4. The operations on A SINGLE matrix are available by pressing [Shift][Matrix].
  5. The choices are
  • [1:Dim] to change the dimension of a matrix (in fact redefining the matrix)
  • [2:Data] enter values in a matrix
  • [3:MatA] access Matrix A
  • [4:MatB] access Matrix B
  • [5:MatC] access matrix C
  • [6:MatAns] access the Answer Matrix (the last matrix calculated)
  • [7:det] Calculate the determinant of a matrix already defined
  • [8:Trn] The transpose of a matrix already defined

Once you have created a square matrix, for example matA.
You press
[Shift][Matrix] [7:det] [SHIFT][MATRIX][3:MatA], close the parenthesis and press [ENTER].

If you have defined two similar matrices (same number of row and same number of columns) you can ADD them or subtract them. The operation keys are Plus and Minus as for any number.
To multiply you use the multiplication sign. The matrices must be compatible (mxn) multiplied by (nxk).

Aug 10, 2011 | Casio FX-115ES Scientific Calculator

1 Answer

How to do matrix multiplication in scientifically calculator


Here is an account of what you can do with matrices on this scientific calculator. Certain precautions must be taken as concerns the dimensions of the matrices. Refer to your text book on matrix algebra.
On this calculator the largest matrices you can define have dimensions 3X3.
  1. First you must set Matrix calculation: Press [MODE][6:Matrix].
  2. Then by entering one of the numbers [1:MatA] or [2:Matb] or [3:MatC] you get to choose the dimensions of the matrix (mxn].
  3. Once finished entering the matrix you clear the screen.
  4. The operations on A SINGLE matrix are available by pressing [Shift][Matrix].
  5. The choices are
  • [1:Dim] to change the dimension of a matrix (in fact redefining the matrix)
  • [2:Data] enter values in a matrix
  • [3:MatA] access Matrix A
  • [4:MatB] access Matrix B
  • [5:MatC] access matrix C
  • [6:MatAns] access the Answer Matrix (the last matrix calculated)
  • [7:det] Calculate the determinant of a matrix already defined
  • [8:Trn] The transpose of a matrix already defined

Once you have created a square matrix, for example matA.
You press
[Shift][Matrix] [7:det] [SHIFT][MATRIX][3:MatA], close the parenthesis and press [ENTER].

If you have defined two similar matrices (same number of row and same number of columns) you can ADD them or subtract them. The operation keys are Plus and Minus as for any number.
To multiply you use the multiplication sign. The matrices must be compatible (mxn) multiplied by (nxk).

Aug 10, 2011 | Casio FX-115ES Scientific Calculator

1 Answer

How do I solve a matrix? I have the manual but do not understand it


I will not try to guess what you mean by "solve a matrix", but I believe that what follows will help you.

  1. First you must set Matrix calculation: Press [MODE][6:Matrix].
  2. Then by entering one of the numbers [1:MatA] or [2:Matb] or [3:MatC] you get to choose the dimensions of the matrix (mxn].
  3. Once finished entering the matrix you clear the screen.
  4. The operations on A SINGLE matrix are available by pressing [Shift][Matrix].
  5. The choices are
  • [1:Dim] to change the dimension of a matrix (in fact redefining the matrix)
  • [2:Data] enter values in a matrix
  • [3:MatA] access Matrix A
  • [4:MatB] access Matrix B
  • [5:MatC] access matrix C
  • [6:MatAns] access the Answer Matrix (the last matrix calculated)
  • [7:det] Calculate the determinant of a matrix already defined
  • [8:Trn] The transpose of a matrix already defined

Once you have created a square matrix, for example matA.
You press
[Shift][Matrix] [7:det] [SHIFT][MATRIX][3:MatA], close the parenthesis and press [ENTER].

If you have defined two similar matrices (same number of row and same number of columns) you can ADD them or subtract them. The operation keys are Plus and Minus as for any number.
To multiply you use the multiplication sign. The matrices must be compatible (mxn) multiplied by (nxk).


If you know the theory behind systems of linear equations you can use matrices to solve the systems.

Nov 26, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

How to use the regular calculator to solve a matrix question?


  1. First you must set Matrix calculation: Press [MODE][6:Matrix].
  2. Then by entering one of the numbers [1:MatA] or [2:Matb] or [3:MatC] you get to choose the dimensions of the matrix (mxn].
  3. Once finished entering the matrix you clear the screen.
  4. The operations on A SINGLE matrix are available by pressing [Shift][Matrix].
  5. The choices are
  • [1:Dim] to change the dimension of a matrix (in fact redefining the matrix)
  • [2:Data] enter values in a matrix
  • [3:MatA] access Matrix A
  • [4:MatB] access Matrix B
  • [5:MatC] access matrix C
  • [6:MatAns] access the Answer Matrix (the last matrix calculated)
  • [7:det] Calculate the determinant of a matrix already defined
  • [8:Trn] The transpose of a matrix already defined

Once you have created a square matrix, for example matA.
You press
[Shift][Matrix] [7:det] [SHIFT][MATRIX][3:MatA], close the parenthesis and press [ENTER].

If you have defined two similar matrices (same number of row and same number of columns) you can ADD them or subtract them. The operation keys are Plus and Minus as for any number.
To multiply you use the multiplication sign. The matrices must be compatible (mxn) multiplied by (nxk).

Sep 27, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

How to find the determinant


First you must set Matrix calculation
[MODE][6:Matrix]. Then By entering one of the numbers [1:MatA] or [2:Matb] or [3:MatC] you get to choose the dimensions of the matrix
(mxn]. Once finished entering the matrix you clear the screen.

The operations on A SINGLE matrix are available by pressing [Shift][Matrix]. The choices are
[1:Dim] to change the dimension of a matrix (in fact redefining the matrix)
[2:Data] enter values in a matrix
[3:MatA] access Matrix A
[4:Matb] access Matrix B
[5:MatC] access matrix C
[6:MatAns] access the Answer Matrix (the last matrix calculated)
[7:det] Calculate the determinant of a matrix already defined
[8:Trn] The transpose of a matrix already defined

Once you have created a square matrix, for example matA.
You press
[Shift][Matrix] [7:det] [SHIFT][MATRIX][3:MatA], close the parenthesis and press [ENTER].

Aug 17, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

Matrix


Here is copy of the answer I posted to a question on how to use Matrices. Read it carefully. It helped a few people, and there is no reason why it should not help you too. If after a bona fide effort to understand it you still have a problem, post a comment here. What I am saying, is do not just shoot the answer, try it first.

First you must set Matrix calculation
[MODE][6:Matrix].
  1. Then By entering one of the numbers [1:MatA] or [2:MatB] or [3:MatC] you get to choose the dimensions of the matrix (mxn)
  2. Once finished entering the matrix you clear the screen.
The operations on a single matrix are available by pressing[Shift][Matrix]. They are
  • [1:Dim] to change the dimension of a matrix (in fact redefining the matrix)
  • [2:Data] enter values in a matrix
  • [3:MatA] access Matrix A
  • [4:Matb] access Matrix B
  • [5:MatC] access matrix C
  • [6:MatAns] access the Answer Matrix (the last matrix calculated)
  • [7:det] Calculate the determinant of a matrix already defined
  • [8:Trn] The transpose of a matrix already defined
Operations involving 2 matrices
  1. To add matrices: MatA+MatB
  2. To subtract: MatA-Matb
  3. To multiply: MatAxMatB
  4. To raise a matrix to a power 2 [x2], cube [x3]
  5. To obtain inverse of MatA already defined MatA[x-1] where [x-1] is the x to the power -1 key
Dimensions of matrices involved in operations must match (see you textbook for the rules). Read the appendix to your user manual, there are several examples.

Jan 07, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

How to do matrix multiplication on Casio 115ES?


Hello
First you must set Matrix calculation
[MODE][6:Matrix]. Then By entering one of the numbers [1:MatA] or [2:Matb] or [3:MatC] you get to choose the dimensions of the matrix
(mxn]. Once finished entering the matrix you clear the screen.
The operations on matrices are available by pressing [Shift][Matrix]
[1:Dim] to change the dimension of a matrix (in fact redefining the matrix)
[2:Data] enter values in a matrix
[3:MatA] access Matrix A
[4:Matb] access Matrix B
[5:MatC] access matrix C
[6:MatAns] access the Answer Matrix (the last matrix calculated)
[7:det] Calculate the determinant of a matrix already defined
[8:Trn] The transpose of a matrix already defined

To add matrices MatA+MatB
To subtract MatA-MatB
To multiply MatAxMatB
To raise a matrixe to a power 2 [x2], cube [x3]
To obtain inverse of MatA already defined MatA[x-1] [x-1] is the x to the power -1 key
Dimensions of matrices involved in operations must match (see you textbook for the rules)

Read the appendix to your user manual, there are several exemples.
Hope helps

Sep 10, 2009 | Casio FX-115ES Scientific Calculator

1 Answer

Can anyone help?


Pantech matrix C740 from at&t

To enter the SIM unlock code, do the following:
1. Put AT&T SIM card in C740
2. Turn on
3. Enter *#865625# on idle screen
4. SIM Unlock Process - Click Yes.
5. Enter 8 digits unlock code and click OK (soft key)
6. Re-enter the unlock code.
7. Unlock Process Complete
8. Click OK (soft key).

Apr 19, 2009 | Pantech C470 Matrix Smartphone

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