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 samisohail94 on December 13th, 2013
Fx-991es Plus Having 8 Modes Changes To 3 Modes Only? Need Help!!
My calcuator fx-991ES plus was working greate but since last few days its modes changes from 8 to only 3 modes. on calculator CALC button is working as Abs and integration is not working i need urgent help!
Current Answers
Related Casio FX-991ES Manual Pages
User Guide - Page 4
...". Note that this manual are subject to change without notice. • In no event shall CASIO Computer Co., Ltd. E-2
• The following procedure when you want to initialize the calculator and return the calculation mode and setup to their initial default settings.
In this User's Guide, cursor key operation is marked with it means...
User Guide - Page 11
...which results will be displayed in nonexponential format. E-9 • Norm: Selecting one of the STAT Mode STAT editor screen on or off. Norm1: 10-2 > x, x >...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 ...calculation results
.
User Guide - Page 12
..., subtraction, multiplication, and division, functions, and parentheses.
k Initializing the Calculation Mode and Other Settings
Performing the following procedure initializes the calculation mode and other setup settings as they are written.Then simply press the = key to execute it is automatically input with Parenthesis
When you need to this: COMP MthIO Deg Norm1 d/c a+bi OFF Dot...
User Guide - Page 14
...The calculator automatically changes to the insert mode whenever you change to let you know. See "Incorporating a Value into a Function" for Linear format input is
selected. About the Insert and Overwrite Input Modes With the insert mode,...in the current expression, the
cursor changes shape to I to the overwrite mode when you need it becomes 369 × 12
LINE
369*13
Y
2
E-12 When...
User Guide - Page 18
... press = and obtain a calculation result using Math format, you can incorporate part of the expression you need to view the entire input ...expression again, press A and then press e. Incorporating a Value into a Function When using Math format, part of an input expression (a value, an expression within parentheses, etc.) into a function. Math
1Y(INS)
This changes...
User Guide - Page 20
CMPLX Mode polar coordinate display (r ∠ θ )
The following are the calculations for which ' form is also counted as a term). ' form calculation results use display formats like those shown
below.
± a'b , ± d ± a'b , ± a'b ± d'e cf
E-18
Trigonometric function calculations
c. Complex number Abs calculations
d. a. k ' Form Calculation Range
Note
...
User Guide - Page 26
....
If you are cleared whenever you turn off the calculator, press the O key, change to edit the expression you can press A and then d or e to the calculation mode or the input/output format, or perform any reset operation.
• Calculation history memory is limited. Modes that calculation history memory contents are using Linear format, you used for...
User Guide - Page 27
... A, B, C, D, X, and Y can hold up to 15 digits.
• Answer Memory contents are not change to recall Answer Memory contents after the first one of individual values.
Using Calculator Memory
Memory Name
Description
Answer Memory Stores the last calculation result obtained.
If you need to another calculation mode. Independent Memory
Calculation results can use memory.
User Guide - Page 28
...upper left of the different operations you press the A key, change the calculation mode, or turn off the calculator. To do this:
Add the displayed value or result of...appears in independent memory.
• Independent memory contents are maintained even if you can add calculation results to or subtract results from independent memory
Recall current independent memory contents
Perform this key...
User Guide - Page 29
This clears independent memory and causes the "M" indicator to variable A. 3+51t(STO)y(A)
• Use the following procedure when you press the A key, change the calculation mode, or turn off the calculator. Example: To multiply the contents of variable A by the contents of an expression. k Clearing the Contents of All Memories
Use the following shows how...
User Guide - Page 31
...CALC, press A. • If the expression you specify otherwise, an equation is solved for the log function.
Example: Y = X + 5, Y (Solves for each one variable,
an input prompt appears for Y.);
Example: Y = X + 5, X = sin(M), X + 3 = B + C,
XY + C (Treated as the value of an changes...COMP Mode (...Unless you are using contains more than one . Appendix
Calculate an +1 = an + 2n (a1 = 1) ...
User Guide - Page 36
...; A "Time Out" error occurs when an integration calculation ends without the ending condition being integrated, the presence of positive and negative values in the COMP Mode only. • The integration result will interrupt an ongoing integration calculation. E-34
Appendix to
k Integration Calculations
This calculator performs integration using Math format. • There may occur...
User Guide - Page 38
... points in
x values -
A default value
of the tolerance range. differential calculation results approaching zero • Pressing A will interrupt an ongoing differential calculation. inclusion of the inflection point in the COMP Mode only. • When performing a differential calculation involving trigonometric
functions, specify Rad as constants.)
a: Input a value to take...
User Guide - Page 40
... and Rnd( functions can be used in complex number calculations in the CMPLX Mode. Appendix Abs (2 - 7) = 5
Random Number (Ran#) This function generates a 3-digit pseudo random number that is zero or a positive integer.
n and r must be integers in the same modes as the trigonometric functions. Example: Pol ('2, '2) + 5 = 2 + 5 = 7
Appendix to
k Other Functions
This section explains how...
User Guide - Page 44
... Result Display Format
Your calculator can select the coordinate format by configuring the calculator's setup. Complex Number Calculations
(CMPLX)
Your calculator can also input complex numbers using polar coordinate format
(r ∠ θ ). Appendix (1 + 3i) ÷ (2i) = -3 - -1 i 22
k Inputting Complex Numbers
• In the CMPLX Mode, the W key changes function to as the i key...
User Guide - Page 48
... On the STAT editor screen, move the cursor to the line that will not work if the maximum number of the calculator's setup screen.
Important!
• Note that you selected, and on the type... data you input is deleted automatically whenever you change to another mode from the STAT Mode or change the Statistical Display setting (which causes the FREQ column to delete. (2) Press Y.
User Guide - Page 57
...examples of calculations with negative binary values and examples of a two's complement
• Negative binary, octal, and hexadecimal values are displayed with Three Unknowns
Quadratic Equation
Cubic Equation
Changing the ...re-enter the EQN Mode.
k Equation Types
An equation type menu appears when you want to press Ab first. Equation Calculations (EQN)
All calculations in the EQN...
User Guide - Page 58
..."STAT Editor Screen Input Precautions".
Initializing All Coefficients to Zero You can input in the COMP Mode with three unknowns or cubic equation is selected as those for the equation. • Each...first STAT editor screen precaution does not apply in the currently selected cell. • To change the contents of = displays the next solution, if there is displayed returns to the ...
User Guide - Page 64
... "VctA".
k Creating and Managing a Vector Creating a Vector and Saving It in the function f(x). • Note that changing the input/output format settings (Math format or Linear format) on the calculator's setup screen while in the VECTOR Mode (N8). Note
• Certain functions and Start, End, Step value combinations can cause number table generation...
User Guide - Page 72
... Modes only) • Cause
• The matrix or vector you are trying to use in a calculation...calculation range by changing the Start, End, and Step values, and try again. Insufficient MEM Error • Cause
• There is close to see if they are trying to perform a calculation with the calculation. Time Out Error • Cause
• The current differential or integration calculation...
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