Casio FX-991ES Support Question
Casio FX-991ES Support Question
Find answers below for this question about Casio FX-991ES.Need a Casio FX-991ES manual? We have 2 online manuals for this item!
Question posted by kdbeasla on June 20th, 2014
How To Reset A Calculator Fx 991 Es
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Related Casio FX-991ES Manual Pages
User Guide - Page 4
... this manual are for the angle unit. Note that this operation also clears all data currently in calculator memory.
19(CLR)3(All)=(Yes)
• For information about calculation modes and setup settings, see "Calculation Modes and Calculator Setup".
• For information about memory, see the symbol Appendix in this manual, it . shall not be...
User Guide - Page 5
... make sure that can cause certain components to suddenly burst, creating the risk of small children. Disposing of the Calculator
• Never dispose of battery specified for later reference. Keep this calculator. Never expose the battery to direct heat or dispose of it into the hands of small children and accidentally swallowed...
User Guide - Page 6
....
• Avoid use thinner, benzene or other tight-fitting clothing where it off with a cloth moistened in areas subjected to temperature extremes.
Avoid carrying the calculator in direct sunlight, near a window, near a heater or anywhere else it may require replacement sooner than the normal expected battery life.
• Low battery power...
User Guide - Page 7
..., press A.
• You can also adjust contrast using the calculator, slide its hard case downwards to remove it probably means that battery power is on the... calculator. • Press 1A(OFF) to adjust display contrast. Before Using the Calculator
k Removing the Hard Case
Before using d and e while the mode menu ...
User Guide - Page 8
... variable's value. There is more data above/below the current screen. The calculator is grads. The display currently shows an intermediate result of significant digits is degrees...disappear when you press a key. The default angle unit is in effect. Example:
Input expression
{ Calculation result
k Display Indicators
Sample Display:
CMPLX
This indicator:
S
A
M
STO
RCL
STAT CMPLX
MAT VCT...
User Guide - Page 9
... to perform this mode:
COMP CMPLX
STAT
BASE-N
EQN MATRIX
TABLE
VECTOR
(2) Press the number key that takes a long time to display the mode
menu.
Calculation Modes and Calculator Setup
k Calculation Modes
When you can use to select. • To select the CMPLX Mode, for example, press 2. Important!
• For a very complex...
User Guide - Page 10
...) 14.29 (Fix2)
• Sci: The value you specify (from 1 to be displayed as they are rounded off to the specified digit before being displayed. Calculation results are written on paper.
• Linear format causes fractions and other expressions to 10) controls the number of significant digits for displayed...
User Guide - Page 11
... available settings (Norm1, Norm2) determines the range in which results will be displayed in nonexponential format. The decimal point for input values is applied for calculation results
.
Norm1: 10-2 > x, x > 1010 Norm2: 10-9 > x, x > 1010
Example: 1 ÷ 200 = 5 × 10-3 (Norm1) 0.005 (Norm2)
Specifying the...
User Guide - Page 12
...(, Conjg(, Not(, Neg(, det(, Trn(, Rnd(
E-10 Example: 2 (5 + 4) - 2 × (-3) =
LINE
2(5+4)2*y3=
Inputting a Function with Parenthesis
When you input calculation expressions just as shown below , it .The calculator automatically judges the calculation priority sequence for addition, subtraction, multiplication, and division, functions, and parentheses. Next, you need to execute it is...
User Guide - Page 13
... . Omitting the Multiplication Sign You can use Math format. For more than one byte. Displaying a Long Expression The display can omit one byte. Number of a calculation, immediately before the = key is pressed. Example: sin 30 =
LINE
s30)=
Pressing s inputs "sin(".
• Note that the input procedure is different if you are...
User Guide - Page 14
...whether you know. The procedure you input replaces the character at a convenient point and
calculate the result. About the Insert and Overwrite Input Modes With the insert mode, the displayed... mode is selected. • The initial default for more information. • The calculator automatically changes to the insert mode whenever you change to let you have insert or overwrite...
User Guide - Page 15
... correct the expression 369 × × 12 so it becomes
369 × 12 LINE Insert Mode:
369**12
dd
Y Overwrite Mode:
369**12
ddd
Y
Correcting a Calculation Example: To correct cos(60) so it becomes sin(60) LINE Insert Mode:
c60)
dddY
s Overwrite Mode:
c60)
dddd
s Inserting Input into...
User Guide - Page 16
... 14 ÷ 10 × 2 = Use the insert mode for the following operation. This is allowed.
Further input will become impossible if the height of the calculation you are inputting exceeds the allowable limit.
• Nesting of an Error
If an error message (like "Math ERROR" or "Syntax ERROR") appears when you...
User Guide - Page 17
...is
selected. • Pay close attention to the location and size of e) Square Root Cube Root Square, Cube Reciprocal Power Power Root Integral Derivative Σ Calculation Absolute Value Parentheses
Key Operation ' 1'(() & 1l($) 1i(%) ! 1!(#) w, 1w(x3) E 6 16(") 7 17(F) 1&(8) 1w(Abs) ( or )
Bytes 9 13 6 4 4 4 9 4 5 4 9 8 6 8 4 1
Math Format Input Examples • The following operations are...
User Guide - Page 18
...:
Function Key Operation Resulting Expression
Fraction
'
log(a,b) Power Root
& 16(")
E-16 Math
!
Example 3: To input (1 + 2 )2 × 2 =
5
MATH
Math
(1+'2c5e)
w*2=
• When you press = and obtain a calculation result using Math format, you can be used in the Example 3 screen shot. If you need to use them.
Example: To incorporate the expression inside...
User Guide - Page 19
...for S-D conversion. Example 1: '2 +'8 = 3'2
MATH
Math
1
!2e+!8=
Math
2
!2e+!81=
E-17 Original Expression:
Function Key Operation
Integral
7
Resulting Expression
Derivative
17(F)
Σ Calculation 1&(8)
You can specify whether calculation results should be displayed in a form that includes expressions like '2 and π (irrational number form). • Pressing = after inputting...
User Guide - Page 20
... that includes ' within irrational number display) results can have up to both the real part and the imaginary part. a. Arithmetic calculations of the above ranges. Complex number Abs calculations
d.
Angle Unit Setting Deg Rad
Gra
Angle Value Input
Units of 15°
Multiples
of
1 12
π
radians
50 Multiples of grads
3
Input...
User Guide - Page 21
... underlined areas in decimal form even when any intermediate result has three or more terms.
Example: (1 + '2 + '3 )(1 - '2 - '3 )(= -4 - 2'6 ) = -8.898979486
E-19 More than two terms in the calculation result
• Calculation results displayed in ' form are displayed in ' form even if coefficients (a′, c′, and d′) are outside of the examples are reduced to be...
User Guide - Page 22
...
3 decimal places (Fix3)
SCI
3 significant digits (Sci3) • For more information, see "Specifying the Number of decimal places and significant digits for the calculation result. For more information, see "Calculation Priority Sequence".
Number of Decimal Places and Number of Significant Digits You can specify a fixed number of Display Digits". Example: log3 + '2 = 1.891334817...
User Guide - Page 26
... history memory maintains a record of each calculation expression you turn off the calculator, press the O key, change to the calculation mode or the input/output format, or perform any reset operation.
• Calculation history memory is deleted automatically to make room for the previous calculation. Calculation history memory shows both calculation expressions and results.
When the...
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