Sharp EL-9900 - Manual (Page 29)

19
Chapter 2: Operating the Graphing Calculator
ALPHA Key
Use A to enter an alphabet character. With the Basic keyboard, all 26 alphabet
characters from “A” up to “Z”, and space can be typed; the Advanced keyboard has all
26 characters accessible, as well as “ θ ”, “=”, “ : ”, and space.
All functions associated with A are color coded purple, and are printed above
each key.
Note: Do not type out math figures ( sin, log, etc.), graph equation
names (Y1, Y2, etc.), list names (L1, L2, etc.), or matrix names
(mat A, mat B, etc.), etc. with A keys. If “SIN” is entered from
A mode, then each alphabet character — “S”, “I” and “N” —
will be entered as a variable. Call up the figure and equation
names from within the second functions and various menus
instead. If a colon (:) is used, data may continue to be entered in
more than one term.
Example
Enter 2
×
A on the screen.
1. Press # C to clear
the screen. Enter “2
×
” by
pressing 2 |.
2. To enter “A”, press A;
the cursor pattern changes
to “A _” upon releasing the key.
3. Press A to call “A” at the
cursor.
After the entry, the cursor
pattern changes back to
normal.
To type more than one alphabet character, use @ then A
to apply the “ALPHA-LOCK”. When done, press A to escape
from the mode.
Entering one
Alphabet
character
Entering 1 or
More Alphabet
characters