20 Most Recent Casio Brand New-Fx-991es Plus - Scientific Calculator Questions & Answers


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

Casio Brand... | Answered on May 21, 2019


See images below


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Casio Brand... | Answered on Apr 04, 2019


Thanks for the sharing this idea with us because we have need so much of this https://windowsclassroom.com/how-to-switch-users-on-windows-10 article and i am sure if all user will be see tis article then they will be also happy.

Casio Brand... | Answered on Nov 28, 2018


To convert a single answer from symbolic to decimal, press the S--D key (just above the DEL key). To have all answers come out in decimal format, press SHIFT MODE 2 to switch to the LineIO mode.

Casio Brand... | Answered on Nov 21, 2018


You can't.

Casio Brand... | Answered on Sep 23, 2018


Write your equations first, then try to use the calculator to solve the problem. If you don't know how to do it by hand, you won't be able to ask the calculator to do it for you.

Casio Brand... | Answered on Apr 08, 2018


If it does not have the FACT key, you must factor by hand: Divide by 2, then by 3, 5, 7 etc.

Casio Brand... | Answered on Apr 08, 2018


I would take it apart and see if they installed the display upside down. I wouldn't think the wires would be long enough to do this, but maybe that is the way it is laid out.

Good luck.

Paul

Casio Brand... | Answered on Sep 17, 2016


I'm having trouble with this one.

If I evaluate 120 x ((1/30)-0.3219281), I get -34.631372.

If I evaluate 120 x ((1/(30-0.3219281), I get 4.043389355.

Any questions, let me know.

Good luck,

Paul

Casio Brand... | Answered on Aug 28, 2016


What you call the iota may be the key to enter imaginary parts of complex numbers. Please read your calculator's manual.

Casio Brand... | Answered on Sep 04, 2015


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.

Casio Brand... | Answered on Sep 04, 2015


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

Casio Brand... | Answered on Nov 11, 2014


One foot is exactly 0.3048 meters, so one meter is about 3.28 feet.

Casio Brand... | Answered on Oct 01, 2014


It only calculates the FIRST derivative of a function that is defined by a formula. The derivative is calculated at a point that must be given.

Casio Brand... | Answered on Sep 19, 2014


Use the EQN mode. Select the type of equation, and type in the coefficients. Then solve. It is not sure you will find it again after you turn off calculator.

Casio Brand... | Answered on Aug 30, 2014


Press [SHIFT][ division key]. It is marked with nCr.

Casio Brand... | Answered on Aug 27, 2014

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