Question about Casio Fx-991es Scientific Calculator

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Does the casio fx-991ES have a computer algebra system

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Posted on Jan 02, 2017

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SOURCE: mode change

Hello,
Just so that we know what we are talking about. The natural display is the display mode in which fractions appear on two lines, radicals appear as radicals, log can be calculated in any base, etc. If that is what you understand by Natural Display, we are in agreement.
To set this mode, you turn calculator ON and press [SHIFT][MODE] (setup). The option is called MathIO, and it has the number 1.
Thus [SHIFT][MODE][1:MathIO].
Hope it helps.

Posted on Oct 13, 2009

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SOURCE: when i press the MODE button in my CASIO fx - 911ES

Hello,
Just in case : Press [SHIFT][CLR] (9) [3: ALL] to reset the calculator and try [MODE] again.
If that does not work, your calculator may be defective or a fake (not the genuine article). If at all possible, return it to where you bought it and get a refund.
moz-screenshot.png
Here is a picture of the FX-115ES, its face looks like the 991ES. Hope I am mistaken.

15199ec.jpg

Posted on Oct 18, 2009

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SOURCE: can you show how to convert pola to rectangular o

Hello,
To avoid errors make sure that the angle unit is THE ONE required by your problem. To verify or to change the angle unit press [SIFT][MODE] and select [3: Deg] for degrees, [4:Rad] for radians, or [5:Grad] for grads.

Convert from rectangular to polar

[SHIFT][+] (Pol) . Screen displays Pol(
You enter the X-coordinate, and the Y coordinate separated by a comma, then you close the parenthesis and press [=].

Exemple: Polar coordinate of the point (1,1)
Pol( 1, 1) gives
r=1.414213562 (square root of 2)
θ=45

Here is how you enter it
Press [SHIFT][MODE][2:LineIO]
[SHIFT][POL] 1 [SHIF] [,] 1 [)] [=]

The screen displays
Pol(1,1)
r= 1.414213562
θ= 45


Convert from polar to rectangular coordinates

Rec ( radius, angle) =

Exemple: Recatngular coordinates of (r=3, θ=60°)
[SHIFT][Rec] 3 [SHIFT][,] 60 [ ) ] [=]
The screen displays
Rec(3,60)
X= 1.5
Y= 2.598076211


Hope it helps.

Posted on Nov 15, 2009

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SOURCE: i want casio fx-991es result

To convert a single result to decimal, press SD. To have all results come out in decimal, press SHIFT MODE 2 to select LineIO mode.

Posted on Oct 04, 2010

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SOURCE: I'm using Casio fx 991ES,

Press SHIFT MODE 2 to switch to LineIO mode.

Posted on Oct 21, 2010

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How to do interpolation in Casio f2f-4800p?


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1 Answer

How can i get infinity sign???


You cannot. It will be of no use to you on this calculator because it cannot do algebra.

Nov 10, 2014 | Casio Brand New-Fx-991es Plus - Scientific...

1 Answer

Answers in log or ln form?


This is a good scientific calculator that can do a lot, but things in the realm of a CAS (Computer Algebra System) are beyond its capabilities.

Apr 23, 2014 | Casio Brand New-Fx-991es Plus - Scientific...

1 Answer

Calculators fx algebra


The FX-991ES Plus barely handles simple operations on matrices of dimensions up to 3X3. It cannot find eigenvalues or eigenvectors.

Oct 24, 2013 | Casio Brand New-Fx-991es Plus - Scientific...

2 Answers

I use casiofx-991ES,its numbers looking upside down.How can i fix it?


I had the same problem with my casio fx-991ES calculator, i tried initializing the calculator by keying in shift9(CLR)3(all)=(yes) but that didn't fix the display,so i opened the calculator and removed the battery for about 5days then put the battery back guess what the display started operating well! no more inverted display or numbers.if initializing the calculator does not fix the problem,take out the battery for some few days then put it back in that should fix the problem.cheers

Sep 27, 2013 | Casio Fx-991es Scientific Calculator

2 Answers

How i can get infinity symbol in casio fx-991es plus calculator


why cant they include infinity symbol ? sometimes i feel my calculator is so dumb !

Nov 16, 2012 | Casio Brand New-Fx-991es Plus - Scientific...

1 Answer

How to get infinity symbol


You cannot. The calculator does not have a Computer Algebra System or CAS. If you are trying to calculate an integral over an infine interval, you must try some high values to simulate infinity and find a value after which the value of the integral stops changing .

Nov 16, 2012 | Casio Fx-991es Scientific Calculator

1 Answer

How we can multiply two algebraic equation in 991 ES CASIO calculators


The Calculator does not have a Computer Algebra System (CAS), and cannot perform algebraic operations with variables. However if you enter some expression with variables, it can solve for one unknown after it prompts you for the values of the others

Oct 05, 2012 | Casio Fx-991es Scientific Calculator

1 Answer

How to calculate Modular inversion on My Casio


Your calculator cannot perform inverse modulo calculations. To calculate yourself ( with pen and paper) you should consult a book on algebra.

Aug 21, 2012 | Casio Office Equipment & Supplies

1 Answer

Can you calculate indefinite integrals on the casio fx-9860G


Unfortunately, the Casio FX-9860 G does not have a Computer Algebra System or CAS. For this reason it can only calculate definte integral over a given interval. The lower and upper limits must be supplied. The result will be a number.
Casio calculators that have a CAS are the Casio ClassPad CP330/ 300Plus/ 330, or the Algebra FX 2.0.

Feb 08, 2012 | Casio FX-9860G Graphic Calculator

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