Casio fx-CG50 User manual

CASIO Worldwide Education Website
https://edu.casio.com
Manuals are available in multi languages at
https://world.casio.com/manual/calc/
fx-CG50 (Version 3.50)
fx-CG50 AU (Version 3.50)
fx-CG20 (Version 3.12)
fx-CG20 AU (Version 3.12)
fx-CG10 (Version 3.12)
Software
User’s Guide
EN

i
• The contents of this user’s guide are subject to change without notice.
• No part of this user’s guide may be reproduced in any form without the express written
consent of the manufacturer.
• Be sure to keep all user documentation handy for future reference.

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Contents
Getting Acquainted — Read This First!
Chapter 1 Basic Operation
1. Keys .............................................................................................................................. 1-1
2. Display .......................................................................................................................... 1-3
3. Inputting and Editing Calculations................................................................................. 1-7
4. Using the Math Input/Output Mode ............................................................................. 1-15
5. Option (OPTN) Menu .................................................................................................. 1-30
6. Variable Data (VARS) Menu ....................................................................................... 1-31
7. Program (PRGM) Menu ............................................................................................. 1-34
8. Using the Setup Screen .............................................................................................. 1-35
9. Using Screen Capture................................................................................................. 1-39
10. When you keep having problems… ........................................................................... 1-40
Chapter 2 Manual Calculations
1. Basic Calculations......................................................................................................... 2-1
2. Special Functions.......................................................................................................... 2-7
3. Specifying the Angle Unit and Display Format............................................................ 2-12
4. Function Calculations.................................................................................................. 2-14
5. Numerical Calculations ............................................................................................... 2-25
6. Complex Number Calculations.................................................................................... 2-35
7. Binary, Octal, Decimal, and Hexadecimal Calculations with Integers......................... 2-39
8. Matrix Calculations...................................................................................................... 2-42
9. Vector Calculations ..................................................................................................... 2-59
10. Metric Conversion Calculations................................................................................... 2-64
Chapter 3 List Function
1. Inputting and Editing a List............................................................................................ 3-1
2. Manipulating List Data................................................................................................... 3-7
3. Arithmetic Calculations Using Lists............................................................................. 3-13
4. Switching between List Files....................................................................................... 3-17
5. Using CSV Files.......................................................................................................... 3-18
Chapter 4 Equation Calculations
1. Simultaneous Linear Equations .................................................................................... 4-1
2. High-order Equations from 2nd to 6th Degree .............................................................. 4-3
3. Solve Calculations......................................................................................................... 4-4
Chapter 5 Graphing
1. Sample Graphs ............................................................................................................. 5-1
2. Controlling What Appears on a Graph Screen.............................................................. 5-5
3. Drawing a Graph......................................................................................................... 5-13
4. Saving and Recalling Graph Screen Contents............................................................ 5-20
5. Drawing Two Graphs on the Same Screen................................................................. 5-23
6. Manual Graphing......................................................................................................... 5-25
7. Using Tables ............................................................................................................... 5-32
8. Modifying a Graph....................................................................................................... 5-38
9. Dynamic Graphing ...................................................................................................... 5-42
10. Graphing a Recursion Formula................................................................................... 5-45
11. Graphing a Conic Section ........................................................................................... 5-50

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12. Drawing Dots, Lines, and Text on the Graph Screen (Sketch) ................................... 5-52
13. Function Analysis ........................................................................................................ 5-54
Chapter 6 Statistical Graphs and Calculations
1. Before Performing Statistical Calculations.................................................................... 6-1
2. Calculating and Graphing Single-Variable Statistical Data ........................................... 6-8
3. Calculating and Graphing Paired-Variable Statistical Data (Curve Fitting)................. 6-15
4. Performing Statistical Calculations.............................................................................. 6-23
5. Tests ........................................................................................................................... 6-33
6. Confidence Interval ..................................................................................................... 6-47
7. Distribution .................................................................................................................. 6-50
8. Input and Output Terms of Tests, Confidence Interval, and Distribution .................... 6-66
9. Statistic Formula ......................................................................................................... 6-69
Chapter 7 Financial Calculation
1. Before Performing Financial Calculations..................................................................... 7-1
2. Simple Interest .............................................................................................................. 7-3
3. Compound Interest........................................................................................................ 7-4
4. Cash Flow (Investment Appraisal) ................................................................................ 7-7
5. Amortization .................................................................................................................. 7-9
6. Interest Rate Conversion ............................................................................................ 7-12
7. Cost, Selling Price, Margin.......................................................................................... 7-13
8. Day/Date Calculations................................................................................................. 7-14
9. Depreciation................................................................................................................ 7-15
10. Bond Calculations ....................................................................................................... 7-17
11. Financial Calculations Using Functions ...................................................................... 7-20
Chapter 8 Programming
1. Basic Programming Steps............................................................................................. 8-1
2. Program Mode Function Keys...................................................................................... 8-2
3. Editing Program Contents............................................................................................. 8-4
4. File Management .......................................................................................................... 8-6
5. Command Reference .................................................................................................. 8-11
6. Using Calculator Functions in Programs..................................................................... 8-28
7. Program Mode Command List ................................................................................... 8-52
8. CASIO Scientific Function Calculator
Special Commands
⇔Text Conversion Table .......................................................... 8-60
9. Program Library .......................................................................................................... 8-67
Chapter 9 Spreadsheet
1. Spreadsheet Basics and the Function Menu ................................................................ 9-1
2. Basic Spreadsheet Operations ..................................................................................... 9-3
3. Using Special Spreadsheet Mode Commands .......................................................... 9-19
4. Conditional Formatting ................................................................................................ 9-21
5. Drawing Statistical Graphs, and Performing Statistical and Regression
Calculations................................................................................................................. 9-27
6. Spreadsheet Mode Memory....................................................................................... 9-34
Chapter 10 eActivity
1. eActivity Overview....................................................................................................... 10-1
2. eActivity Function Menus ............................................................................................ 10-2
3. eActivity File Operations ............................................................................................. 10-4
4. Inputting and Editing Data........................................................................................... 10-6

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Chapter 11 Memory Manager
1. Using the Memory Manager........................................................................................ 11-1
Chapter 12 System Manager
1. Using the System Manager......................................................................................... 12-1
2. System Settings .......................................................................................................... 12-1
Chapter 13 Data Communication
1. Performing Data Communication between
the Calculator and a Personal Computer.................................................................... 13-3
2. Performing Data Communication between Two Calculators..................................... 13-10
3. Connecting the Calculator to a Projector .................................................................. 13-14
Chapter 14 Geometry
1. Geometry Mode Overview ......................................................................................... 14-1
2. Drawing and Editing Objects..................................................................................... 14-11
3. Controlling the Appearance of the Geometry Window.............................................. 14-33
4. Using Text and Labels in a Screen Image ................................................................ 14-37
5. Using the Measurement Box..................................................................................... 14-41
6. Working with Animations........................................................................................... 14-56
Chapter 15 Picture Plot
1. Picture Plot Function Menus ....................................................................................... 15-3
2. Managing Picture Plot Files ........................................................................................ 15-5
3. Using the Plot Function............................................................................................... 15-7
4. Using the Plot List ..................................................................................................... 15-13
5. Common Functions with the Graph Mode................................................................ 15-18
Chapter 16 3D Graph Function
1. Example of Drawing in the 3D Graph Mode............................................................... 16-2
2. 3D View Window......................................................................................................... 16-4
3. 3D Graph Function List ............................................................................................... 16-6
4. 3D Graph Function Selection Screen.......................................................................... 16-8
5. 3D Graph Screen ...................................................................................................... 16-14
Chapter 17 Python (fx-CG50, fx-CG50 AU only)
1. Python Mode Overview .............................................................................................. 17-1
2. Python Function Menu ................................................................................................ 17-4
3. Inputting Text and Commands.................................................................................... 17-6
4. Using the SHELL....................................................................................................... 17-14
5. Using Draw Functions (casioplot Module)................................................................. 17-18
6. Editing a py File......................................................................................................... 17-24
7. File Management (Searching For and Deleting Files)............................................... 17-26
8. File Compatibility....................................................................................................... 17-27
9. Sample Scripts .......................................................................................................... 17-29
Appendix
1. Error Message Table ....................................................................................................α-1
2. Input Ranges ..............................................................................................................α-14
Examination Modes ..................................................................................... β
β
-1

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E-CON4 Application
1. E-CON4 Mode Overview............................................................................................... ε-1
2. Sampling Screen........................................................................................................... ε-3
3. Auto Sensor Detection (CLAB Only)............................................................................. ε-9
4. Selecting a Sensor...................................................................................................... ε-10
5. Configuring the Sampling Setup ................................................................................. ε-12
6. Performing Auto Sensor Calibration and Zero Adjustment ......................................... ε-20
7. Using a Custom Probe................................................................................................ ε-23
8. Using Setup Memory................................................................................................... ε-25
9. Starting a Sampling Operation.................................................................................... ε-28
10. Using Sample Data Memory ....................................................................................... ε-33
11. Using the Graph Analysis Tools to Graph Data .......................................................... ε-35
12. Graph Analysis Tool Graph Screen Operations.......................................................... ε-39
13. Calling E-CON4 Functions from an eActivity .............................................................. ε-51

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Getting Acquainted — Read This First!
kAbout this User’s Guide
uAttention fx-CG10, fx-CG20, fx-CG20 AU Users
This manual explains how to use the fx-CG50. There are some differences in the marking of
some fx-CG50 keys and the keys of the fx-CG10, fx-CG20, and fx-CG20 AU. The table below
shows the differences in key markings.
fx-CG50 fx-CG10/fx-CG20/fx-CG20 AU
'$
fM
5E
uMath natural input and display
Under its initial default settings, the calculator is set up to use the “Math input/output mode”,
which enables natural input and display of math expressions. This means you can input
fractions, square roots, derivatives, and other expressions just as they are written. In the
“Math input/output mode”, most calculation results also are displayed using natural display.
You also can select a “Linear input/output mode” if you like, for input and display of
calculation expressions in a single line.
The examples shown in this User’s Guide are mainly presented using the Math input/output
mode. “<Linear input/output mode>” will be indicated for examples that use the Linear input/
output mode.
• For information about switching between the Math input/output mode and Linear input/
output mode, see the explanation of the “Input/Output” mode setting under “Using the Setup
Screen” (page 1-35).
• For information about input and display using the Math input/output mode, see “Using the
Math Input/Output Mode” (page 1-15).
u!x(')
The above indicates you should press !and then x, which will input a 'symbol. All
multiple-key input operations are indicated like this. Key cap markings are shown, followed by
the input character or command in parentheses.
umEquation
This indicates you should first press m, use the cursor keys (f, c, d, e) to select
the Equation mode, and then press w. Operations you need to perform to enter a mode
from the Main Menu are indicated like this.
uFunction Keys and Menus
• Many of the operations performed by this calculator can be executed by pressing function
keys 1through 6. The operation assigned to each function key changes according to
the mode the calculator is in, and current operation assignments are indicated by function
menus that appear at the bottom of the display.
0

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• This User’s Guide shows the current operation assigned to a function key in parentheses
following the key cap for that key. 1(Comp), for example, indicates that pressing 1
selects {Comp}, which is also indicated in the function menu.
• When (g) is indicated in the function menu for key 6, it means that pressing 6displays
the next page or previous page of menu options.
uMenu Titles
• Menu titles in this User’s Guide include the key operation required to display the menu
being explained. The key operation for a menu that is displayed by pressing Kand then
{LIST} would be shown as: [OPTN]-[LIST].
• 6(g) key operations to change to another menu page are not shown in menu title key
operations.
uCommand List
The Program Mode Command List (page 8-52) provides a graphic flowchart of the various
function key menus and shows how to maneuver to the menu of commands you need.
Example: The following operation displays Xfct: [VARS]-[FACTOR]-[Xfct]
kDisplay Brightness Adjustment
Adjust the brightness whenever objects on the display appear dim or difficult to see.
1. Use the cursor keys (f, c, d, e) to select the System icon and press w, then
press 1(DISPLAY) to display the brightness adjustment screen.
2. Adjust the brightness.
• The ecursor key makes display brightness lighter.
• The dcursor key makes display brightness darker.
• 1(INITIAL) returns display brightness to its initial default.
3. To exit display brightness adjustment, press m.

1-1
Chapter 1 Basic Operation
1. Keys
kKey Table
Page Page Page Page Page Page
Page Page Page Page Page
2-1
1-34 1-35
1-2
2-16
2-16
2-1
2-1,
2-23 2-1 2-7
2-36
2-16
2-9
5-54 5-5 5-52 5-56 5-2,
5-35
5-8
1-30
2-16
2-17
2-17
1-25,
2-23
2-23
2-23
1-22
1-8
2-1
2-1
2-11
2-1
1-7,1-20
2-1
1-12
2-16
2-9
1-11
5-4,
5-15
2-49
1-39
1-12
3-3
2-36
10-21 10-19
2-16
1-2 2-16
1-18
1-31 1-3
Page Page Page Page Page Page
Page Page Page Page Page
2-1
1-34 1-35
1-2
2-16
2-16
2-1
2-1,
2-23 2-1 2-7
2-36
2-16
2-9
5-54 5-5 5-52 5-56 5-2,
5-35
5-8
1-30
2-16
2-17
2-17
1-25,
2-23
2-23
2-23
1-22
1-8
2-1
2-1
2-11
2-1
1-7,1-20
2-1
1-12
2-16
2-9
1-11
5-4,
5-15
2-49
1-39
1-12
3-3
2-36
10-21 10-19
2-16
1-2 2-16
1-18
1-31 1-3
1

1-2
kKey Markings
Many of the calculator’s keys are used to perform more than one function. The functions
marked on the keyboard are color coded to help you find the one you need quickly and easily.
Function Key Operation
1log l
210x!l
3Bal
The following describes the color coding used for key markings.
Color Key Operation
Yellow Press !and then the key to perform the marked function.
Red Press aand then the key to perform the marked function.
• Alpha Lock
Normally, once you press aand then a key to input an alphabetic character, the keyboard
reverts to its primary functions immediately.
If you press !and then a, the keyboard locks in alpha input until you press aagain.