Question about Office Equipment & Supplies
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
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
In any scientific calculator log2(n) can be calculated with either ln or log function as
Log2(n)= ln(n) / ln(2)
Log2(n)=log(n) / log(2)
both will give nearly the same answers
Posted on Apr 24, 2009
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
Here is the solution for th FX-991ES.
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
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
The link is for FX991ES. Look there foe you manual.
Hope it helps
Posted on Sep 07, 2009
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!"
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
Tips for a great answer:
Dec 03, 2015 | Casio Office Equipment & Supplies
Feb 25, 2014 | Casio FX991MS Scientific Calculator
Oct 21, 2013 | Casio FX-9860G Graphic Calculator
Sep 14, 2013 | Office Equipment & Supplies
Aug 09, 2013 | Office Equipment & Supplies
Nov 07, 2012 | Casio FX991MS Scientific Calculator
Nov 06, 2012 | Casio FX991MS Scientific Calculator
May 09, 2012 | Casio FX991ES Scientific Calculator
Oct 19, 2009 | Casio FX-300MS Calculator
141 people viewed this question
Usually answered in minutes!