Question about Casio Brand New-Fx-991es Plus - Scientific Calculator

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Error function (erf) using calculator

How can I calculate error function (erf) using the calculator. Eg. erf (0.07)

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error function (erf) using calculator - error-function-erf-using-calculator-j4h2e5ixgdpna1zostjitdkl-5-0.jpg

Posted on May 16, 2016


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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Casio calculator MS-8TV

you hold your set % button down for three seconds until set shows again, then hit tax rate button it shows your tax rate, change your tax rate then hit set your tax rate should be set.

cliff notes:
hold set% button
hit tax+ button
change the desired %
hit set done

Posted on Jan 11, 2008

  • 86 Answers

SOURCE: Manual for the casio fx-260 solar fraction calculator

FX-260Solar User Manual

Posted on Feb 09, 2009

SOURCE: i can't find an antilog function in my calculator .

Anti log will be shown as 10^x (10 raised to power x) For natural log it's e^x I think it's shift > log

Posted on Jun 03, 2009

  • 1 Answer

SOURCE: Percenteg Function problem in my Casio MJ - 120 Model Calculator

I found it by myself, I can help you.
1. Press (AC)
2. Hold (Rate) for about 2-3 second
3. Press (Set / TAX+)
4. Input the tax rate
5. Press (Set / TAX+)
6. Hold (Rate) for about 2-3 second again
7. Press (Set / TAX+) again
And Then you can test the rate .

From Thailand

Posted on Oct 19, 2009

  • 8081 Answers

SOURCE: trying to use the "e" symbol on my calculator but

You are not using the correct syntax of the exponential function.
[SHIFT][e^x] ( number) .
[SHIFT][e^x] 1 EXE] gives 2.718281828
[SHIFT][e^x] [(-)] 3 gives 0.04978706837 . The (-) is the change sign to the left of the [EXE] key.

For simple arguments the parentheses are not necessay, but it is safer to use them to avoid ambiguities and erroneous results.
Hope it helps.

Posted on Oct 23, 2009

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On my casio fx-83GT PLUS calculator whenever i use the inverse cos,sine and tan function math ERROR comes up how do i fix this

The inverse cosine function is defined for arguments from -1 to +1. 6 is outside of this domain, thus the error. Do you get an error if you try the inverse cosine of 0.6, for example?

If you're getting the same error for the inverse tangent, could you post an example?

May 12, 2014 | Casio FX83ES Scientific Calculator

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Mod operation in fx-83gt plus

Like many other Casio calculators, the fx-83GT Plus doesn't provide the modulus function. You have to do it the hard way.
To calculate 19 MOD 10 (which is 9, not 10 as you state in your question), first divide 19 by 10 and note the integer portion of the result (in this case, 1). Then subtract from 19 the product of 10 and the result of the first step. The result of the subtraction is the modulus. 19 - (1*10) = 9.

May 10, 2013 | Office Equipment & Supplies

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How do you find the derivative without values for x

I am not sure I understand what you want, but if I am guessing right, you need to calculate formulas for derivatives, where the name of some variable appears eg= d(x^2)/dx = 2 x.
Sorry, the calculator does not have a CAS, you cannot perform symbolic calculations regardless of the subject (derivatives, integrals, sums of series, factoring polynomials, expanding polynomial products, polynomial division, etc.)

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

1 Answer

How to calculate integration in fx-991ms

Syntax is $( function,lower bound,upper bound) =
Press the Integral key. $(
Type in the function eg. sin
Type the variable: SHIFT ) to enter X
Type in a comma separator ,
Type in the lower bound of the integral
Type in a comma separator ,
Type in the upper bound
Close the right parenthesis )
Press = to get the result.
Note: You have to wait for the calculator to return with the answer. Some calculations may require time to perfor.

Jan 11, 2012 | Casio Office Equipment & Supplies

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Error when using inverse trig inever used to get these errors when trying to find angles using whole numbers inside the inverse trig functions but now it will only calculate SOME fractions. wether the...

If you are trying to calculate arcsine (sin^-1) and arccosine (cos^-1) the only whole number you can use are -1,0 and 1. This due to the fact that the domain of these functions is the closed interval [-1,1]. Any value outside that interval will trigger an error message. No limitation on the argument of the arc tangent or arc cotangent functions

If the angle unit is set to degree the arc will be in degrees, and if angle unit is radian, the arc will be in radians.

Sep 27, 2011 | Texas Instruments TI-84 Plus Calculator

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When I attempt to use hyperbolic functions for complex numbers i get a domain error

Have you checked the calculator's manual to see if the calculator is able (natively) to handle functions of a complex argument. It is able to handle simple algebra with complex numbers, powers, roots, solving a polynomial equation.
For this calculator, the hyperbolic functions must have a real argument otherwise you get a error. But just to make sure, try the exponential function with i (imaginary unit) as argument. If it comes back with a domain error you have your answer.

Apr 06, 2011 | Texas Instruments TI-89 Calculator

1 Answer

I'm using model EL-738. I need to figure out how to enter fractions on this calculator. for eg: 1.06^1/4 -1 = what buttons do i use. I do not have a / button.

Use parenthesis.

1.06 [2nd] [ DEPR ] [ ( ] 1 [ / ] 4 [ ) ] [ - ] 1

2nd [ DEPR ] should be x^y or the exponentiation function.

Mar 02, 2011 | Sharp EL738C Scientific Calculator

1 Answer

Square root function

You can find square root by giving your desired number ^ 1/2

May 25, 2010 | Office Equipment & Supplies

1 Answer

How do you fix an MA error when attempting to graph a function? I have even tried to graph simple functions like (X) or (5) and it still says MA error.

A. This is due to a mathematical error such as
  1. dividing by 0,
  2. an illogical operation,
  3. calculations outside the range of a function,
  4. using the exponential function with the [^] key,
  5. logarithm of a negative number,
  6. calculating the factorial of numbers larger that 69,
  7. what have you.
  8. Check the expression of the function you are trying to graph.
B. Reset your calculator and start again: Press the button on the back of the calculator; use a starightened paper clip.Draw the line y=XPress Menu.
  1. Use keys to highlight [GRAPH] and press [EXE].
  2. Make sure the screen that opens says Graph Func Y= at the top.
  3. On the Y1= line enter X (use the [X,theta,T] key under the [ALPHA] key.
  4. Press [F6:Draw].
  5. You should see a staright line passing through the origin (0,0).

Feb 18, 2010 | Casio CFX-9850G Plus Calculator

1 Answer

How do i calculate permutation in fx-82ms casio calculator


Find on the calculator the [nPr] key either (you may have to use the [2nd] or [2ndF] key) then
1. Enter the number that corresponds to n eg. 18
2. Press the [nPr] key
3. Enter the number that corresponds to r eg. 5

18[nPr]5 gives 1028160

If you calculate combinaitions use [nCr] key.

Hope it helps

Aug 11, 2009 | Casio FX-115ES Scientific Calculator

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