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Most Recent Casio FX-991ES Questions
How To Calculate Indefinite Integration Using 991ms Calculator
(Posted by nikhilbetavalli0 6 months ago)
How Do I Store Values From Another Mode?
I cannot store values in my calculator from specifically mode 5 equation 3, do i store the answers t...
I cannot store values in my calculator from specifically mode 5 equation 3, do i store the answers t...
(Posted by mitchhkgyvr 7 months ago)
Syntax Error
why do i get syntax error when i am trying to calc the equation A=Y-X^2:X=Ran#(2)+2:Y=Ran#(12)+4 in ...
why do i get syntax error when i am trying to calc the equation A=Y-X^2:X=Ran#(2)+2:Y=Ran#(12)+4 in ...
(Posted by sazzsrp 1 year ago)
For Some Reason, My Casio Fx-991es, Power On Button Refuses To Work. I Opened Th
For some reason, my Casio fx-991ES, power on button refuses to work. I opened the casing and took ou...
For some reason, my Casio fx-991ES, power on button refuses to work. I opened the casing and took ou...
(Posted by almuhseen24 1 year ago)
Casio FX-991ES Videos
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Popular Casio FX-991ES Manual Pages
User Guide - Page 9
... f.
The setup menu has two screens, which you can use to control how the calculations are executed and displayed.
Select this type of operation: General calculations Complex number calculations Statistical and regression calculations Calculations involving specific number systems (binary, octal, decimal, hexadecimal) Equation solution Matrix calculations Generation of calculation that...
User Guide - Page 11
... Display Format
To specify this fraction display format: Mixed Improper
Perform this key operation:
1Nc1(ab/c) 1Nc2(d/c)
Specifying the Complex Number Display Format
To specify this complex Perform this key operation:
1Nc5(Disp)1(Dot) 1Nc5(Disp)2(Comma)
• The setting you configure here is applied for input values is always a dot ( ). • Norm: Selecting one of the STAT Mode STAT...
User Guide - Page 12
... ∫(, d/dx(, Σ(, P(, Q(, R(, arg(, Conjg(, Not(, Neg(, det(, Trn(, Rnd(
E-10 Next, you input any of the functions shown below .
19(CLR)1(Setup)=(Yes)
This setting: Calculation Mode Input/Output Format Angle Unit Display Digits Fraction Display Format Complex Number Format Statistical Display Decimal Point
Is initialized to input the argument and the closing parenthesis ()).
User Guide - Page 20
...term). ' form calculation results use display formats like those shown
below.
± a'b , ± d ± a'b , ± a'b ± d'e cf
E-18 Angle Unit Setting Deg Rad
Gra
Angle Value Input
Units of 15°
Multiples
of
1 12
π
radians
50 Multiples of the above ranges.
k ' Form Calculation Range
Note
When performing complex number calculations in decimal form for input...
User Guide - Page 34
... time to display calculation results.
The following shows the required key operations and the values this section show operation in functions. See "Specifying the Default Angle Unit" for BASE-N.
All of functions. Before performing a calculation, be used in the COMP, STAT, EQN, MATRIX, TABLE, and VECTOR calculation modes. Appendix sin 30 = 0.5, sin-10.5 = 30
k Hyperbolic and Inverse...
User Guide - Page 36
... Appendix to take considerable time to complete. • A smaller tol value provides better precision, but it also causes the calculation to
*1 A base of 10 (common logarithm) is used in complex number calculations in the CMPLX Mode, and complex number arguments are supported.
• The X^, '(, 3'(, ^'( functions can be large error in obtained integration values and errors may be used...
User Guide - Page 44
...to become an imaginary number i input key.
Use the i key when inputting a complex number of Calculation Results Using Rectangular
Coordinate Format (a + bi )
Example 1: 2 × ('3 + i) = 2'3 + 2i = 3.464101615 + 2i
MATH
CMPLX
Math
2*(!3e+i)=
E-42 Appendix (1 + 3i) ÷ (2i) = -3 - -1 i 22
k Inputting Complex Numbers
• In the CMPLX Mode, the W key changes function to as the...
User Guide - Page 45
... result, perform the following key operation at the end of the calculation.
12(CMPLX)3('r∠ θ )
Appendix 1 + i (= '2 ∠ 45) = 1.414213562 ∠ 45
k Conjugate Complex Number (Conjg)
You can use the following operation to obtain a conjugate complex number. 12(CMPLX)2(Conjg)
Appendix Determine the conjugate of -180°< θ < 180°. Example 2: 1 + i = '2 ∠ 45...
User Guide - Page 49
... Editor Contents" only when the STAT editor screen is for calculating the mean, standard deviation, etc. k STAT Calculation Screen
The STAT calculation screen is on the calculator's setup screen. The STAT calculation screen also uses Linear format, regardless of commands for performing statistical calculations with the data you want to display the STAT menu.
Pressing the A key while...
User Guide - Page 50
...963;n 4xσn-1
Number of samples Mean of the sample data Population standard deviation Sample standard deviation
MinMax Sub-menu (11(STAT)6(MinMax))
Select this menu item: 1minX 2maxX
When you want to do this:
7Reg
Display the Reg sub-menu of commands for normal distribution calculations • For more information, see "Commands when Linear
Regression Calculation (A+BX) Is Selected...
User Guide - Page 52
...Sub-menu (11(STAT)5(Var))
Select this menu item: When you want to obtain this menu item: When you select 4(Sum), 5(Var), 6(MinMax), or 7(Reg) on the STAT menu while linear regression is performed in accordance with the following model equation.
Commands when Linear Regression Calculation (A+BX) Is Selected With linear regression, regression is selected as the statistical calculation type.
User Guide - Page 53
... y
• Sum sub-menu (sums), Var sub-menu (number of y
Appendix Linear Regression Calculation: to obtain this menu item: 1A 2B
3C
4m1 5m2 6n
When you want to
• Examples through all use the data input in accordance with the following model equation.
Reg Sub-menu (11(STAT)7(Reg))
Select this menu item: When you want to...
User Guide - Page 59
.../ output format and complex number display format settings of the calculator's setup screen.
• Note that the matrix selection screen also appears whenever you enter the MATRIX Mode.
(2) Press a number key (1, 2, or 3) to specify the name of simultaneous linear equations, you can save matrices under the names "MatA", "MatB", and "MatC" in a special Matrix Answer Memory named "MatAns".
User Guide - Page 60
...govern the coefficient editor screen in the EQN Mode. Copying the Contents of One Matrix to Another Matrix (1) Use the matrix editor screen to display the matrix you want to
copy, or display the Matrix Answer Memory screen. • If you want to copy Matrix A, for "MatA".
(4) Use the matrix editor screen to input each of matrix calculations. MAT
Stands for Inputting and Editing Coefficients...
User Guide - Page 69
... digits used for exponential display is a real number or a complex number. Precision for storage of consecutive calculations.
The vector stack has five levels. Calculation Range and Precision
Calculation Range
±1 × 10-99 to be exceeded. A Stack ERROR occurs when the calculation you are cumulative in combination with the general-purpose numeric stack.The matrix stack...
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