Question about Casio Brand New-Fx-991es Plus - Scientific Calculator
How can I calculate error function (erf) using the calculator. Eg. erf (0.07)
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Posted on Jan 02, 2017
SOURCE: Casio calculator MS-8TV
SETTING YOUR TAX RATE
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.
hold set% button
hit tax+ button
change the desired %
hit set done
Posted on Jan 11, 2008
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 .
Posted on Oct 19, 2009
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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