Question about Casio CFX 9850GA Plus Calculator

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Casio cfx-9850gb plus

OK, changed batteries both at the same time, I know, didn't see that part. nor do I have an instruction manual. When I turn it on, all I get is a screen with list 1, list 2, list and 4, then 1,2,3,4,5 in the viertical column, In number 1 is 2.2266, at the very bottom right is a row of 2's. I can't get it to do anything but boot to this screen. Your help would be appreciated. Paul Shea

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2 Answers

Re: casio cfx-9850gb plus

Pitch it in the trash and go by a good HP or TI equivelent!!!!

Posted on Jun 17, 2008

Re: casio cfx-9850gb plus

In it's back, there is a small hole-reset key. prick it with your pencil.

Posted on Feb 09, 2008

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Convert a polar equation to a rectangular equation?

To convert a complex number (not an equation) from rectangular coordinates to polar coordinates you do as follows
2+3[OPTN][ F3 (CLPX)][F1(i)][F6 >][F3> r ,theta][EXE]


Nov 08, 2014 | Casio CFX-9850G Plus Calculator

1 Answer

I have casio cfx 9859gb plus i dont know how to change from deg to rad pls help

Press SHIFT [SETUP] to bring up the setup screen. Move down to the line beginning "Angle" and select "Rad."

Nov 29, 2010 | Casio CFX 9850GB Plus Calculator

1 Answer

Casio CFX-9850GB Plus calculator will not switch on when AC/on pressed, all 4 AAA and 3v backup battery are new.

If it is just a matter of the screen being too dim, you can actually increase the contrast.

  1. Turn calculator ON
  2. Press [MENU] even if you do not see anything
  3. Press [ALPHA][COS] sequence to access the letter E.
  4. Press repeatedly the Right Arrow till the contrast is adequate.

Jun 14, 2010 | Casio CFX-9850G Plus Calculator

1 Answer

Casio cfx-9850gb plus calculators's graph messed up

Press the RESET button on the back of the calculator. Use a starightened paper clip.

May 05, 2010 | Casio CFX 9850GB Plus Calculator

1 Answer

Do i have only one type of exponencial regression o my 9850gb plus?

Th CFX-9850GB Plus is programmed to perform 10 types of regressions, namely
LinearReg: Linear y=ax+b
Med-Med also linear y=ax+b
QuadReg :Quadratic y= ax^2+bx+c
Cubic: y=ax^3+bx^2+cx+d
Quartic: y=ax^4+bx^3+cx^2+dx+e
LogReg, logarithmic: y=a+b*ln(x)
ExpReg, exponential y=a*e^(bx)
PowerReg, power: y= ax^b
SinReg, sinusoidal: y=a*sin(bx+c) +d
LogisticReg, logistic; y= c/(1+a*e^(-bx))

There may be more regression models appropriate for more advanced (specialized) statistics but the ones in the list are all the CFX-9850GB plus offers. However, since the calculator knows a programming language, you may want to implement a particular model.

Hope that helps.

Oct 24, 2009 | Casio CFX 9850GB Plus Calculator

1 Answer

Generating random numbers

Turn calculator ON, press MENU if you see no icons. Use arrow key to highlight the RUN application. Press OPTN, press F6 to pan right. Press F3: Prob, then F4:Ran# then EXE to execute.

Each time you press EXE a new random number is generated. You might want to fix the number of decimal digits to less than the 10 digits displayed by default.

By default number generated are between 0 and 1. If you want numbers between 0 and 100 you enter Ran#(100).

Hope it helps.

Oct 20, 2009 | Casio CFX 9850GB Plus Calculator

1 Answer

To change the mode from rad to deg

Turn calculator ON. Scroll menu icons to RUN. Press [EXE].
Press [SHIFT][SETUP] . Scroll down to 5th line. Press F1. Angle changes to Deg. Press [EXE].

Sep 24, 2009 | Casio CFX 9850GB Plus Calculator

1 Answer

Calculation with angle

You perform all calculations in complex mode. When you need to convert to angle amplitude, in the [RUN] screen press [OPTN][F3:CMPLX]
To obtain the angle press [Arg] ( complex number) [EXE]
To obtain the magnitude, amplitude press [Abs] (complex number) [EXE].
Since the [ANS] memory keeps only the last value calculated, you may have to store your result (the complex number) in a variable.

1+ 1 i [white right arrow under tan key to store] [ALPHA] H
Display shows 1+1i. Then
[Abs] [ALPHA] H [EXE] gives 1.414213562
[Arg] [ALPHA] H [EXE] gives 45

Hope it helps.

May 22, 2009 | Casio CFX 9850GB Plus Calculator

1 Answer


Here is the link to the user s manual.
Hope it helps.

Dec 18, 2008 | Casio CFX 9850GA Plus Calculator

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