7
y and ƒ keys
Most keys on the TI-82 STATS can perform two or more functions.
To use a function printed on a key, press the key. To use a
function printed above a key in green or orange, you must first
press the y key or the ƒ key.
y key
Second functions are printed above the keys in green (the same
color as the y key). Some secondary functions enter a function
or a symbol on the home screen (sin
-1
or ‡, for example). Others
display menus or editors.
To view the ANGLE menu, for example, look for ANGLE (printed
in green) above the key near the top of the TI-82 STATS
keyboard. Press the y key (and then release it) and then press
. In this book and in the TI-82 STATS Guidebook, this key
combination is indicated by y ;, not y . When you
see these key combinations, press each key separately, not at the
same time.
Note: The flashing cursor changes to
Þ
when you press the
y
key. If
you press the
y
key accidentally, you can undo the action by
pressing
y
a second time.
ƒ key
The ƒ key lets you enter the alphabetic characters and some
special symbols. To enter T, for example, press ƒ (and then
release it) and then press ¶. In this book and in the TI-82 STATS
Guidebook, this key combination is indicated by ƒ [ T ].
If you have several alphabetic characters to enter, press
y 7 to avoid having to press the ƒ key multiple times.
This locks the alpha key in the On position until you press ƒ a
second time to unlock it.
Note: The flashing cursor changes to
Ø
when you press the
ƒ
key.
If you press the
ƒ
key accidentally, you can undo the action by
pressing
ƒ
a second time.
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