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How to perform operations on complex number in bistec BS-991MS calculator?

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  • 8,081 Answers

Put the calculator in complex Mode. Enter a complex number and press the key for the operation you want to perform, + for addition etc.

Posted on Oct 19, 2015

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Posted on Jan 02, 2017

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Anonymous

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SOURCE: how to calculate log value in calculator with different base value

In any scientific calculator log2(n) can be  calculated with either ln or log function as follows
 
Log2(n)= ln(n) / ln(2)
 
Or
Log2(n)=log(n) / log(2)

both will give nearly the same answers

Posted on Apr 24, 2009

Anonymous

  • 1 Answer

SOURCE: m mod n in Casio fx991MS

there is one button ab/c beneath CALC... if u want to calculate 7 mod 4 then... u should press 7 then ab/c 4 and equal to
1, 3 ,4 which is 4*1=4 and 7-4=3 remainder...

Posted on Jun 29, 2009

k24674

  • 8081 Answers

SOURCE: how to calculate inverse of a 3x3 matrix in casio

Hello,
Here is the solution for th FX-991ES.
Hello,

The error may be due to the key you used to signifie inverse. It says in the manual that you should use the key x^-1 not the one used to input general powers.
Here is screen capture from the Appendix to the manual. The picture shows the sequence of keys to press to obtain the inverse of a 2x2 matrix. It is taken from page 41 of Appendix

moz-screenshot-1.pngd2bc4ab.jpg
The matrix used in the exemple is
a_11=2 a_12=1 a_21=1 a_22=2
Here is the link to download the manual and the appendix

http://support.casio.com/manualfile.php?rgn=1&cid=004001004
The link is for FX991ES. Look there foe you manual.

Hope it helps


Posted on Sep 07, 2009

k24674

  • 8081 Answers

SOURCE: Hi, I have a Casio calculator fx-991MS giving me wrong answers!

Hello,
I am only looking for a plausible cause of the error, because I do not believe your calculator can make such a mistake. I think you accidentally activated the Exponential display format and did not pay attention to the small, raised -03 that came at the end of the number displayed. It is a common mistake for those not very familiar with Scientific or exponential notation.

Let us try to reset your calculator to the normal (floating point) format.
Press the [MODE] key a number of times until you reach a screen that has FIX, SCI, NORM and under each one a number (FIX 1, SCI 2), Norm 3). To have the number of decimal place you gave in your result (4 decimal digits), you press 1 to select Fix then 4.

Be aware that scientific calculators usually stop displaying results in floating point format ( 0.0000045 ) if the number is smaller then 0.001. So basically, 0.00099 will be displayed as 9.90-04, -04 being raised above the level, and in smaller size.

Hope it helps.

Posted on Oct 02, 2009

Testimonial: "Thanks so much, its working now:) I thought I was going to have to buy a new calculator!"

k24674

  • 8081 Answers

SOURCE: how to calculate calculus problem by a scientific

Hello,
If by calculus problem you mean derivatives of functions, integrals, extrema and such things, I am sorry to inform you that neither the Casio FX-300MS, nor the FX-991MS can handle them. The newer Casio calculator FX-991ES is capable of performing numerical differentiations and integrations. There also graphing calculators by Casio FX-9750G, FX-9860G as well as by Texas Instruments (TI 83 PLUS/TI84PLUS) that are reasonably performant in that area.

Hope it helps.

Posted on Oct 19, 2009

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2 Answers

I've got a casio fx 991plus calculator and I want to know how to use feet and inches in the calculation displays, like how is used meters and centimetres in the display


PDF]fx-570MS/991MS Additional Functions - Support - Casio

support.casio.com/pdf/004/fx570MS_991MS_E.pdf

Casiodisplay format (Disp) settings while the calculator is in the BASE ... Be sure to checkthe current calculation mode (SD, REG,. COMP ... Use [ and ] to display the expression 4 + 4. Press A ... want to perform scientific function calculations. COMP .

The Casio fx-991es, fx-570es and - Numericana

www.numericana.com/answer/casio.htm
The Casio fx-991ex succeeds the fx-991es (functionally identical to the ... Both are nonprogrammable nongraphing scientific calculators, with natural ... Side-by-side comparison of the fx-991EX and fx-991ES PLUS. ... Displays QR codes for smartphone use .... Work out a formula for many values of the input variables.

CASIO fx-991MS Calculator Tutorial: Lesson 5- Dealing with ...


Dec 03, 2015 | Casio Office Equipment & Supplies

1 Answer

Shall we find rank of a matrix with casio fx-991ms???????????


This calculator can perform some operations on matrices with dimensions up to 3X3, but it cannot be used to find the rank of a matrix. Sorry.

Feb 25, 2014 | Casio FX991MS Scientific Calculator

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How to calculate 2^24 in bistec calculator bs-991ms


you cant you have to get a scientific calculator with the carrot symbol like this ^

Sep 14, 2013 | Office Equipment & Supplies

1 Answer

How to enter matrix in bs-991ms bistec calculator ?


how can i sovle matrix in bistec bs-991ms calculator

Aug 09, 2013 | Office Equipment & Supplies

1 Answer

Casio fx 991ms


On a fx-991MS? With many other models, including the fx-991ES, I'd say you have the calculator in binary mode but the 991MS doesn't have such a mode.

Aug 03, 2013 | Office Equipment & Supplies

1 Answer

How to do matrix problems in fx991ms


The following was written for the Casio FX-991 ES. If matrix calculations are available on your calculator you will perform them as described below. ( I have no time to verify that the FX-991ms can perform matrix calculations).

Let me explain how to create matrices. (If you know how to do it, skip to the operations on matricies, at the end.)

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.
Here is a short summary

The multiplication of structured mathematical entities (vectors, complex numbers, matrices, etc.) is different from the multiplication of unstructured (scalar) mathematical entities (regular umbers). As you well know matrix multiplication is not commutative> This has to do with the dimensions.

An mXn matrix has m rows and n columns. To perform multiplication of an kXl matrice by an mXn matrix you multiply each element in one row of the first matrix by a specific element in a column of the second matrix. This imposes a condition, namely that the number of columns of the first matrix be equal to the number of rows of the second.
Thus, to be able to multiply a kXl matrix by am mXn matrix, the number of columns of the first (l) must be equal to the number of rows of the second (m).

So MatA(kXl) * MatB(mXn) is possible only if l=m
MatA(kX3) * Mat(3Xn) is possible and meaningful, but
Mat(kX3) * Mat(nX3) may not be possible.

To get back to your calculation, make sure that the number of columns of the first matrix is equal to the number of rows of the second. If this condition is not satisfied, the calculator returns a dimension error. The order of the matrices in the multiplication is, shall we say, vital.

Nov 07, 2012 | Casio FX991MS Scientific Calculator

1 Answer

How to multiply the matrices using fx-991ms calculator


The following was written for the Casio FX-991 ES. If matrix calculations are available on your calculator you will perform them as described below. ( I have no time to verify that the FX-991ms can perform matrix calculations).

Let me explain how to create matrices. (If you know how to do it, skip to the operations on matricies, at the end.)

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.
Here is a short summary

The multiplication of structured mathematical entities (vectors, complex numbers, matrices, etc.) is different from the multiplication of unstructured (scalar) mathematical entities (regular umbers). As you well know matrix multiplication is not commutative> This has to do with the dimensions.

An mXn matrix has m rows and n columns. To perform multiplication of an kXl matrice by an mXn matrix you multiply each element in one row of the first matrix by a specific element in a column of the second matrix. This imposes a condition, namely that the number of columns of the first matrix be equal to the number of rows of the second.
Thus, to be able to multiply a kXl matrix by am mXn matrix, the number of columns of the first (l) must be equal to the number of rows of the second (m).

So MatA(kXl) * MatB(mXn) is possible only if l=m
MatA(kX3) * Mat(3Xn) is possible and meaningful, but
Mat(kX3) * Mat(nX3) may not be possible.

To get back to your calculation, make sure that the number of columns of the first matrix is equal to the number of rows of the second. If this condition is not satisfied, the calculator returns a dimension error. The order of the matrices in the multiplication is, shall we say, vital.

Nov 06, 2012 | Casio FX991MS Scientific Calculator

1 Answer

Can we find complex matrices using 991-es?


No!! The only complex number operations you can perform are addition, subtraction, multiplication, and division and raise to an integer power with positive exponent. You can also get the Argument or the conjugate of a number, convert a complex number from rectangular to polar forms and vice versa.
As to matrices, it can only handle up to 3X3 dimension with real coefficients.

May 09, 2012 | Casio FX991ES Scientific Calculator

2 Answers

How to calculate calculus problem by a scientific calculator fx-991ms


Hello,
If by calculus problem you mean derivatives of functions, integrals, extrema and such things, I am sorry to inform you that neither the Casio FX-300MS, nor the FX-991MS can handle them. The newer Casio calculator FX-991ES is capable of performing numerical differentiations and integrations. There also graphing calculators by Casio FX-9750G, FX-9860G as well as by Texas Instruments (TI 83 PLUS/TI84PLUS) that are reasonably performant in that area.

Hope it helps.

Oct 19, 2009 | Casio FX-300MS Calculator

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