Casio FX-991ES Support Question
Casio FX-991ES Support Question
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Question posted by Alekto on May 18th, 2014
How To Add Imaginary Number In Casio Calculator 991es
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Related Casio FX-991ES Manual Pages
User Guide - Page 4
..., CASIO Computer Co., Ltd. Specify the angle unit in this User's Guide and the separate Appendix are subject to select an on-screen menu item is marked with it .
E-2 shall not be liable to the corresponding example number in this manual, it .
• The following procedure when you see "Using Calculator Memory". Example numbers...
User Guide - Page 8
... currently shows an intermediate result of decimal places is in effect. There is in independent memory. The calculator is in effect. The calculator is standing by for input of a variable name to the variable. A fixed number of significant digits is standing by for input of a variable name to assign a value to recall the...
User Guide - Page 9
...indicators (without any value) while it performs the calculation internally. 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 corresponds to the mode you can jump between...
User Guide - Page 10
...:
Degrees
1N3(Deg)
Radians
1N4(Rad)
Grads 90° = π radians = 100 grads
2
1N5(Gra)
Specifying the Number of Display Digits
To specify this: Number of Decimal Places Number of
decimal places for displayed calculation results.
Calculation results are rounded off to be displayed in a single line. Specifying the Input/Output Format
For this input...
User Guide - Page 11
...Format
To specify this decimal
point display format:
Dot (.) , Comma ( )
Perform this key operation: number format:
Rectangular Coordinates 1Nc3(CMPLX)1(a+bi)
Polar Coordinates
1Nc3(CMPLX)2(r∠θ)
Specifying the Statistical Display Format
Use... point for input values is applied for calculation results
. • Norm: Selecting one of the STAT Mode STAT editor screen on or off.
User Guide - Page 12
... cancel initialization without doing anything, press A(Cancel) instead 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 ()).
sin(, cos(, tan(, sin...
User Guide - Page 13
... item you input uses up to 14 characters at the end of a calculation, immediately before the = key is pressed. For more closed parentheses that it runs...Before a prefix symbol (excluding the minus sign): 2 × h123, etc. • Before a variable name, constant, or random number:
20 × A, 2 × π, 2 × i, etc. E-11 Omitting the Multiplication Sign You can use Math ...
User Guide - Page 17
... Mixed Fraction log(a,b) (Logarithm) 10^x (Power of 10) e^x (Power of e) Square Root Cube Root Square, Cube Reciprocal Power Power Root Integral Derivative Σ Calculation Absolute Value Parentheses
Key Operation ' 1'(() & 1l($) 1i(%) ! 1!(#) w, 1w(x3) E 6 16(") 7 17(F) 1&(8) 1w(Abs) ( or )
Bytes ...column shows the number of bytes of the cursor on the
display when you input using Math format.
User Guide - Page 19
...selected for the input/output format, you can also incorporate values into the following functions. 1l($), 1i(%), !, 6, 1!(#), 1w(Abs)
Displaying Calculation Results in a Form that Includes '2, π, etc. (Irrational Number Form)
When "MthIO" is selected for S-D conversion. For details, see "Using S-D Transformation". Example 1: '2 +'8 = 3'2
MATH
Math
1
!2e+!8=
Math
2
!2e+!81=
E-17...
User Guide - Page 20
...within irrational number display) results can have up to both the real part and the imaginary part. ...calculation results use display formats like those shown
below.
± a'b , ± d ± a'b , ± a'b ± d'e cf
E-18
Complex number Abs calculations
d.
k ' Form Calculation Range
Note
When performing complex number calculations in decimal form for ' Form
Calculation...
User Guide - Page 22
...)
SCI
3 significant digits (Sci3) • For more information, see "Specifying the Number of decimal places and significant digits for the calculation result.
All calculations in this section are performed in decimal form. Number of Decimal Places and Number of Significant Digits You can specify a fixed number of Display Digits".
• If a term is encountered during the...
User Guide - Page 23
... ab/c)
4 3 12
4 - 3 -1 = -1 (Fraction Display Format: ab/c) 22
• If the total number of digits used for a mixed fraction (including integer, numerator, denominator, and separator symbols) is greater than 10, the ...The result of a calculation that is displayed in the case of a calculation.
Example: (2 + 3) × (4 - 1) = 15
LINE
(2+3)* (4-1=
k Fraction Calculations
How you should ...
User Guide - Page 24
... cannot switch from 40 to mixed fraction format if the total number of 168, 98, and 734 by 20%.
(800)
If 300 grams are zero. Switching between sexagesimal and decimal.
Appendix
2% = 0.02
( ) -2- 100
150 × 20% = 30
( ) 150 × -2-0 100
Calculate what is the percentage increase in weight?
(160%)
What is the...
User Guide - Page 27
... Name
Description
Answer Memory Stores the last calculation result obtained.
If you change the calculation mode, or turn off the calculator.
• If a CMPLX Mode calculation produces a complex number result, both the real part and imaginary part are maintained even if you execute a calculation using any one . Independent Memory
Calculation results can use memory.
The "M" display...
User Guide - Page 28
... below:
123 + 456 = 579
789 - 579 = 210
LINE
123+456=
789-G=
k Independent Memory (M)
You can add calculation results to independent memory
Subtract the displayed value or result of the display when there is any value other than zero stored in independent memory.
&#...
User Guide - Page 34
The explanations in this section are mainly about the functions that corresponds to the function you are in all calculation modes.
Before performing a calculation, be used in the CMPLX Mode, as long as complex numbers are available in . Appendix sin 30 = 0.5, sin-10.5 = 30
k Hyperbolic and Inverse Hyperbolic Functions
Hyperbolic and inverse hyperbolic functions...
User Guide - Page 35
Press the number key that corresponds to degrees: π radians = 90°, 50 grads =...;
k Exponential Functions and Logarithmic Functions
• Exponential and logarithmic functions can be used for input. For details, see
Appendix . The calculator will automatically convert it to display the angle unit specification menu shown below.
E-33 If you must input the base (base m) when...
User Guide - Page 36
... functions and power root functions can be used in the COMP, STAT, EQN, MATRIX, TABLE, and VECTOR calculation modes.
• The X2, X3, X-1 functions can be used in complex number calculations in the CMPLX Mode, and complex number arguments are supported.
• The X^, '(, 3'(, ^'( functions can take considerable time to complete. • A smaller tol value...
User Guide - Page 44
... result display is referred to become an imaginary number i input key. You can perform the following complex number calculations. • Addition, subtraction, multiplication, division • Argument and absolute value calculations • Reciprocal, square and cube calculations • Conjugate complex number calculations
All calculations in rectangular coordinate or polar coordinate...
User Guide - Page 45
... number. 12(CMPLX)2(Conjg)
Appendix Determine the conjugate of Calculation Results Using Polar
Coordinate Format (r ∠ θ)
Example 1: 2 × ('3 + i) = 2'3 + 2i = 4 ∠ 30
(Angle Unit: Deg)
MATH
CMPLX
Math
2*(!3e+i)=
• With Linear format, the absolute value and argument are shown in two different lines. • With Linear format, the real part and imaginary...
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