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#### fx-82AU Series

Below is a video showing you how to calculate the least squares line of best fit and the associated correlation coefficient using the CASIO fx-82AU PLUS II.

The default setting of a CASIO fx-82 is for ‘natural’ mathematical input and output. This means that you can input your calculations in the same way that you would write them, and that the output is provided in a similar way.

The setting for mathematical output means that answers are given in fractional form, even when we might expect them not to be.

When using the current fx-82AU PLUS, the calculator can be set to LineO, meaning that fractional outputs only occur when fractional inputs are given.

To change to LineO, press w and make sure you are in COMP mode by pressing 1.

Now press q and then w to enter the SET UP.

Choose MthIO by pressing 1. You should now have a choice between MathsO and LineO. Press 2 for LineO.

The screen shots below illustrate the output when the fx-82 is set to LineO

Note: Older models of fx-82AU PLUS do not have the option of LineO

CASIO supply the Australian market with two scientific calculators, the fx-82AU and the fx-100AU. What is the difference? In the simplest terms, the 100AU has more functions than the 82AU but uses a more traditional entry mode.

These differences can be explained in more detail under three main points:

1. The 82AU provides the option to use latest in input method (natural display or MATH, for example fractions can be entered as fractions). You can, however, also use LINE input on the 82AU where the use of brackets becomes important. The 100AU only offers LINE input.

2. The 82AU’s functionality is largely a subset of the functionality offered by the 100AU. The 100AU offers more functionality, mainly involving higher order functions. For example binary computation, complex number computation (polar and cartesian) and a host more. You can see the extra functions at

3. The 82AU provides list-based Statistics input, whereas the 100AU does not.

#### fx-100AU Series

CASIO supply the Australian market with two scientific calculators, the fx-82AU and the fx-100AU. What is the difference? In the simplest terms, the 100AU has more functions than the 82AU but uses a more traditional entry mode.

These differences can be explained in more detail under three main points:

1. The 82AU provides the option to use latest in input method (natural display or MATH, for example fractions can be entered as fractions). You can, however, also use LINE input on the 82AU where the use of brackets becomes important. The 100AU only offers LINE input.

2. The 82AU’s functionality is largely a subset of the functionality offered by the 100AU. The 100AU offers more functionality, mainly involving higher order functions. For example binary computation, complex number computation (polar and cartesian) and a host more. You can see the extra functions at

3. The 82AU provides list-based Statistics input, whereas the 100AU does not.

On an fx-100AU a previous command line can be recalled, edited and recalculated. To do this, press the ! or \$ arrows (not the E arrow). These same arrows allow you to move the cursor within the line so that you can edit the command and then re-calcuate it.

To convert between rectangular and polar coordinates, first you enter the form you want for the output, then enter the two parameters of the input form (x & y or r & theta) . The outputs are stored in memory E and memory F, and can be recalled as required.

For example, to convert (2,5) to polar coordinates

Press e2,5)p

The outputs values are stored as follows ‘r’ is stored in memory E and theta is stored in memory F.

E can be recalled by pressing Qkp and F can be recalled by pressing Qlp.

To convert r=3 and theta=60 degrees to rectangular coordinates

Press qe3,60)p

The outputs values are stored as follows ‘x’ is stored in memory E and ‘y’ is stored in memory F.

E can be recalled by pressing Qkp and F can be recalled by pressing Qlp.

#### fx-9860G AU

The operating system of the CASIO fx-9860G AU can be up-dated. If updated to OS version 2.0 or later then it will have much of the functionality of the 9860G AU PLUS. However, it will not have the natural input in Graph and Equation modes which is a feature of the PLUS model. It will also still differ from a PLUS model in terms of memory size and screen illumination.

To update the operating system visit the CASIO Worldwide Education Website at https://edu.casio.com/dl/ and follow the links.

Note: the update software is different for the 9860G AU and the 9860G AU PLUS models. Ensure that you use the correct update software for your model.

In the Spreadsheet of a CASIO 9860, cells can contain either a numerical value, text or a formula. Each of these are entered in slightly different ways.

Numerical values can be entered directly from the keypad.

To enter text, start by putting the 9860 into ‘alpha lock’ mode. This is done by pressing SHIFT then ALPHA. The red text letters can then be entered.

All text entries need to start with the quotation marks (“). This symbol can be entered via EXP.

Text can now be typed, using the red letters above the keys as required. Note that SPACE is above the decimal.

Press EXE to complete your entry.

At times when using the Solver of the 9860, a solution to the equation that differs from the one expected is obtained. This arises when the equation being solved has more than one solution, and the user is interested in one solution in particular. A simple example is shown below, with an expected solution of 60 degrees.

Upon pressing SOLV, a solution other than 60 degrees is obtained

This value of x does in fact solve the equation, but the user was probably looking for the answer between 0 and 90 degrees.

To resolve this, the user can specify the range of x-values within which the Solver will search for a solution. This is done using the Lower and Upper bounds:

Note: There is no way for the Solver to obtain more than one solution at a time. If multiple solutions need to be ‘seen’ simultaneously, other functionality is required, like the use of y

Problem: When graphing using my 9860, a “Syntax Error” appears as soon as the graph is drawn.

Likely Solution: There is a syntax error with a function that may not immediately visible in GRAPH mode’s display.

The 9860’s GRAPH mode displays four to five functions, but contains up to twenty functions. You can arrow down to see all twenty. These functions are graphed in order, meaning that if a later function contains a Syntax Error, the error message will block the graphs previously drawn. To resolve this, arrow down and delete or edit the offending function.

Some of the reset options on the 9860-series of graphics calculators will result in the deletion of all Add-Ins. This includes the GEOMETRY mode, which is a pre-installed Add-In on the CASIO fx-9860G AU PLUS (and can also be installed on the fx-9860G AU).

To avoid this result, do not use RESET:Add-In, RESET:Add-In&Storage or RESET:Initialise All.

To clear all memeory content except the Add-Ins, use RESET:Main&Storage.

When functions of the form Y1=… are entered, the f key must be used for the variable X.

The ‘on-screen X’ above F5 should not to be used to enter this type of function. Its use wil result in an “Argument Error:

Note: the two X’s are slightly different in appearance.

When using a 9860G AU PLUS (or 9860G AU with OS 1.05 or later) to work with matrices, the commands Ref (row echelon form) and Rref (reduced row echelon form) can be useful. These are found from within q by pressing i then MAT (w) then u to see more commands then either Ref (r) or Rref (y).

#### fx-CG20AU/50AU

If your Emulator / Manager software is showing a message that says your software is expiring in X amount of days, please continue using the current version until you have 5 days remaining.

You will then be able to log in to your Casio Edu account to access a new license code, which will give you another full year of Emulator / Software use.

Please follow the instructions in the attached document to reinstall the software.

Download the PDF for a set of instructions on how to install the latest CG Manager software for Mac or Windows.

2020 Emulator Activation.pdf

#### Emulator / Manager Software

If your Emulator / Manager software is showing a message that says your software is expiring in X amount of days, please continue using the current version until you have 5 days remaining.

You will then be able to log in to your Casio Edu account to access a new license code, which will give you another full year of Emulator / Software use.

Please follow the instructions in the attached document to reinstall the software.

Download the PDF for a set of instructions on how to install the latest CG Manager software for Mac or Windows.

2020 Emulator Activation.pdf

This PDF file contains instructions on how to update the Operating System of the Classpad II Series calculator: CLASSPAD II update.pdf

#### Classpad 330 and 330 PLUS Series

This PDF file contains instructions on how to update the Operating System of the Classpad 330 and 330 PLUS Series calculator: CLASSPAD 330 update.pdf

In the image the ClassPad is set to ‘Decimal’ and ‘Degrees’. To restrict solutions supplied to a certain domain use the | symbol and follow it with an inequality as shown in the image.

Note that the ‘restriction’ command can be placed in two different places, as shown below.

If you own the ClassPad Manager for Windows OS 3.0 or later (32-bit) and require the 64-bit version, you can download it from https://edu.casio.com (free of cost) and install it on a PC running Windows 64-bit.

Tick the box as shown below and then click Next (bottom right).

The install key you will require (if you have downloaded the software from the site above) is the install key from inside your original ClassPad Manager OS 3.0 or later 32-bit CD.

A range of algebraic and graphical results relating to complex numbers can be obtained using a ClassPad. This is done by firstly ensuring that the ClassPad’s setting are correct, and then entering the relevent information. The settings required are shown below:

When looking to obtain graphal results in the complex plane using a ClassPad, firstly define z as a complex number x+yi.

With that done, constraints on z can be entered, and then the ClassPad’s output can be expressed in the form “y=…” so that its graphical meaning is apparent. If this output is then dragged into a graph window, then a graph can be obtained.

Two examples of this process are shown below:

Information accurate for OS 3.06.1000.

If information is known about a function and/or its derivative, and the function contains unknown co-efficients, then that information can be used to determine the value of the unknown co-efficients.

In the example below, it is known that the quadratic function defined as f(x) has a turning point at (3,9). If we define g(x) as the derivative of f(x) then we have two equations, f(3)=9 and g(3)=0, and two unknowns, a and b. If we tap ~ then these equations can be entered, and the unknowns can be solved for, as shown.

NOTE: OVER-SPECIFIED SYSTEMS OF EQUATIONS.

If the number of equations exceeds the number of unknowns then the system of equations can still be solved, assuming that the equations are consistant.

There can be a number of reasons for this to occur. One is that a setting differs between the ClassPads. Another possibility is that ClassPads have different versions of operating systems.

Some important settings are visible at the bottom of the ClassPad’s screen – as shown below in MAIN mode. Changes to these settings will cause the ClassPad to give “different” answers, in particular when providing exact or decimalised values and when working with angles.

Other settings that may have a bearing on the output given by your ClassPad can be found under Basic Format. To see these settings, enter M and then tap O and select Basic Format.

If the settings of two ClassPads are identical and yet they give different outputs in the same circumstances, then there may be a difference in their Operating Systems. This can be checked by going to Y and tapping on System and then choosing Version (Software). A screen like the one below will be displayed:

If your ClassPad has an older Operation System and you would like to update it, detailed instructions can be found under the first question above. There is no cost associated with updating your ClassPad.

When asked to find a definite integral, at times the ClassPad is unable to complete the task analytically and give an exact result. The ClassPad may take a long time to calculate, and seem to be stuck, or may return an “insufficient memory” error message. At these times the ClassPad needs to be asked for a numerical (non-exact) result, rather than than an analytic (exact) result. This can be done two ways.

Integration via the Interactive > Calculation menu. First enter and select the function then choose the integral symbol from this menu. Select the Numeric option, as shown below.

The numerical result will be quickly calculated.

As you can see from the syntax above, the numerical evaluation of a definate integral includes a tolerance value, that tells the ClassPad how accurate it has to be. This can be used to make the definite intergral from 2D keypad perform a numerical computation. To do this, add a tolerance to the upper bound of the definite integral (seperated by a comma) as shown below:

Some work undertaken with a ClassPad leads users to define x as a specific ‘thing’, maybe a matrix or a real or complex number. This definition is retained by the ClassPad until we “clear all variables”. This means that if we attempt to work with x as a variable, when it has been defined previously, unexpected errors and outputs are likely to occur.

To “clear all variables”, when in Main, tap Edit and Clear All Variables.

To check if there is an issue with x (or any other variable you wish to use), input x (in Main). The output should be x if it is to be used as a variable.

This PDF file contains instructions on how to update the Operating System of the Classpad II Series calculator: CLASSPAD II update.pdf

#### Classpad 330 and 330 PLUS Series

This PDF file contains instructions on how to update the Operating System of the Classpad 330 and 330 PLUS Series calculator: CLASSPAD 330 update.pdf

Download the PDF for a set of instructions on how to install the latest Classpad Manager software for Mac or Windows.

2020 Emulator Activation.pdf

A range of algebraic and graphical results relating to complex numbers can be obtained using a ClassPad. This is done by firstly ensuring that the ClassPad’s setting are correct, and then entering the relevent information. The settings required are shown below:

When looking to obtain graphal results in the complex plane using a ClassPad, firstly define z as a complex number x+yi.

With that done, constraints on z can be entered, and then the ClassPad’s output can be expressed in the form “y=…” so that its graphical meaning is apparent. If this output is then dragged into a graph window, then a graph can be obtained.

Two examples of this process are shown below:

Information accurate for OS 3.06.1000.

If information is known about a function and/or its derivative, and the function contains unknown co-efficients, then that information can be used to determine the value of the unknown co-efficients.

In the example below, it is known that the quadratic function defined as f(x) has a turning point at (3,9). If we define g(x) as the derivative of f(x) then we have two equations, f(3)=9 and g(3)=0, and two unknowns, a and b. If we tap ~ then these equations can be entered, and the unknowns can be solved for, as shown.

NOTE: OVER-SPECIFIED SYSTEMS OF EQUATIONS.

If the number of equations exceeds the number of unknowns then the system of equations can still be solved, assuming that the equations are consistant.

Some work undertaken with a ClassPad leads users to define x as a specific ‘thing’, maybe a matrix or a real or complex number. This definition is retained by the ClassPad until we “clear all variables”. This means that if we attempt to work with x as a variable, when it has been defined previously, unexpected errors and outputs are likely to occur.

To “clear all variables”, when in Main, tap Edit and Clear All Variables.

To check if there is an issue with x (or any other variable you wish to use), input x (in Main). The output should be x if it is to be used as a variable.