Using The Clean Up Menu To Start A New Problem - Texas Instruments TI-89 Manual Book

Using the Clean Up Menu to Start a New Problem

Clean Up Toolbar
Menu
Tip: When defining a
variable that you want to
retain, use more than one
character in the name. This
prevents it from being
deleted inadvertently by
1:Clear a–z .
Note: For information about
checking and resetting
memory or other system
defaults, refer to
Chapter 21.
On the Home screen, the Clean Up toolbar menu lets you start
a new calculation from a cleared state without resetting the
memory.
TI-89 / TI-92 Plus's
From the Home screen, display the
2 ˆ
TI.89:
ˆ
TI.92 Plus:
Menu Item Description
Clears (deletes) all single-character variable names
Clear a–z
in the current folder, unless the variables are locked
or archived. You will be prompted to press ¸ to
confirm the action.
Single-character variable names are often used in
symbolic calculations such as:
solve(aøxñ+bøx+c=0,x)
If any of the variables have already been assigned a
value, your calculation may produce misleading
results. To prevent this, you can select
before beginning the calculation.
Places
NewProb
press ¸ to execute the command.
NewProb
begin a new problem from a cleared state without
resetting the memory:
¦
Clears all single-character variable names in the
current folder (same as
variables are locked or archived.
¦
Turns off all functions and stat plots (
PlotsOff
¦
Performs
ClrIO
Restore If a custom menu other than the default is in effect,
this lets you restore the default. Refer to page 37.
custom
default
Clean Up
in the entry line. You must then
NewProb
performs a variety of operations that let you
1:Clear a–z
) in the current graphing mode.
, ,
ClrDraw ClrErr
, and ClrTable .
Chapter 2: Operating the Calculator
menu by pressing:
1:Clear a–z
), unless the
and
FnOff
, ,
ClrGraph ClrHome
43