Texas TI-86 Manual De Usuario

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8
Quick Start
00QWIKST.DOC   TI-86, Quick Start, US English   Bob Fedorisko   Revised: 02/13/01 1:51 PM   Printed: 02/13/01 2:59 PM   Page 8 of 14
Retrieving, Editing, and Re-evaluating the Previous Entry
�   Retrieve the last entry from the previous
example. (The last activity was not cleared.)
- ¢
�   Edit the retrieved entry.
! ! 
3
�   Evaluate. The first derivative of 
x
2
 with
respect to 
x
 at 
3
 is displayed.
b
Converting Degrees Fahrenheit to Degrees Celsius
�   Display the 
CONV
 menu.
(:) - ’
�   Display the 
CONV
 
TEMP
 menu. The 
CONV
menu shifts up and 
TEMP
 is highlighted.
*
�   Enter the known measurement. If the
measurement is negative, use parentheses.
In this example, if you omit parentheses,
the TI
-86 converts 4¡F to about 
L
15.5
¡C,
which it then negates (changes the sign
of), returning a positive 15.5
¡C.
D a 
4
 E
�   Select 
¡
F
 to designate Fahrenheit as the
known measurement unit. 
¡
F
 and the
conversion symbol ( 
4 ) are displayed after
the measurement.                      (continued)
'
When you press 
b
, the
TI
-
86 stores the expression
or instruction you entered to
the built-in memory storage
area called 
ENTRY
.
When expressing a
measurement for a
conversion, you do not enter
a unit symbol manually. For
example, you need not enter
¡
 to designate degrees.