hp-support-head-portlet

Actions
Loading...

Welcome to HP Customer Support

hp-contact-secondary-navigation-portlet

Actions
Loading...

hp-share-print-widget-portlet

Actions
Loading...
  • Information
    Information regarding recent vulnerabilities

    HP is aware of the recent vulnerabilities commonly referred to as "Spectre" and "Meltdown". HP has published a security bulletin with patches for these issues and a list of impacted systems. We will continue to update the bulletin as more information becomes available and encourage customers to check the bulletin frequently.

hp-concentra-wrapper-portlet

Actions
Loading...

HP 50g Graphing Calculator - Using the EquationWriter - Part 2

The EquationWriter
One of the most useful built-in applications of the HP50g is the EquationWriter. This is the best environment for writing, editing and mathematically manipulating formulae. The EquationWriter allows quick and easy work that is very difficult or even impossible to do from the command line. It displays formulae in textbook format, allowing a much easier recognition of terms than the command line since the need to keep track of parentheses is reduced to a minimum. In addition, all commands for formula manipulation can be used, making thus the EquationWriter to a full flavoured environment for work with algebraic objects.
You access the EquationWriter with .
Figure : Accessing EquationWriter
The blinking arrow is the cursor of the EquationWriter. Anything you write is placed at the position of the cursor. The menu items in brief are:
EDIT : Allows to edit a sub expression separately in the command line.
CURS: Switch cursor modes
BIG: Switch font used for display
EVAL: Evaluate sub expression
FACTOR: Factor sub expression
SIMP: Simplify sub expression
(Second menu page)
CMDS: Display the CAS commands catalogue
HELP: Get help for the CAS commands
You can display any menu from inside the EquationWriter, select some of its commands and place it in the EquationWriter (if it is the command is a function allowed in algebraic objects). You can also apply some command from any menu to a sub expression in the EquationWriter, if the command returns one algebraic object.
In the following examples we practise using the features of the EquationWriter to write, edit, and mathematically manipulate expressions.
Practice manipulating formulae in the EquationWriter
Example 1:
Write the expression below in the EquationWriter:
Solution:
Assume RPN mode and soft menus. Start the equation writer.
Figure : Starting the equation writer
Begin writing the formula
Figure : Inserting formula into the equation writer
The sub expression has to be written another two times. Select it and copy it.
Figure : Copying the formula
The EquationWriter has switched to a special mode that allows easy selection of sub expressions. The cursor changed to cross hairs. The selected sub expression is variable X of the sine function. Press and hold the key pressed until the cursor doesn't move any more. Release the key. Now the sub expression is selected that we want to copy.
Figure : Copying the sub expression
(accept the selection and return to normal selection mode)
Figure : Accepting the selection and returning to normal selection mode
(copy the selected sub expression)
Continue writing the formula and paste the copied sub expression.
Figure : Continuing writing the formula and pasting the copied sub expression
(repeat another time)
Figure : Repeating another time
The formula is too big and doesn't fit completely in the screen. Switch to small font display.
Figure : Switching to small font display
(switch back to big font display)
Figure : Switching back to big font display
(put the formula in the command line or on the stack)
Figure : Putting the formula in the command line or on the stack
Example 2:
Factor the expression
Then re-expand the expression leaving factors with trigonometric terms untouched.
Solution:
Start the equation writer and enter the expression.
Figure : Inserting formula into equation writer
(select the whole expression and factor it)
Figure : Selecting the whole expression to factor it
(select the first two factors and expand them)
Figure : Selecting the first two factors and expanding them
(enter the manipulated expression on the stack)
Figure : Entering the manipulated expression on the stack

hp-feedback-input-portlet

Actions
Loading...

hp-online-communities-portlet

Actions
Loading...

Ask the community!


Support Forum

Support Forum

Join the conversation! Find Solutions, ask questions, and share advice with other HP product owners. Visit now


hp-feedback-banner-portlet

Actions
Loading...

hp-country-locator-portlet

Actions
Loading...
Country/Region: Flag Singapore

hp-detect-load-my-device-portlet

Actions
Loading...