Texas Instruments PLUS TI-89 - Manual (Page 46)

Chapter 2: Operating the Calculator 29
02OPER DOC TI-89/TI-92 Plus: Operating the TI-89/TI-92 Plus (English) Susan Gullord Revised: 02/23/01 1:06 PM Printed: 02/23/01 2:11 PM Page 29 of 44
By default, Pretty Print = ON . Exponents, roots, fractions, etc., are
displayed in the same form in which they are traditionally written.
You can use 3 to turn pretty print off and on.
Pretty Print
ON OFF
p ñ ,
p
2
,
x ì 3
2
p ^2 , p /2 , ‡ ((x ì 3)/2)
The entry line does not show an expression in pretty print. If pretty
print is turned on, the history area will show both the entry and its
result in pretty print after you press ¸.
By default, Exact/Approx = AUTO . You can use 3 to select from
three settings.
Because AUTO is a combination of
the other two settings, you should be
familiar with all three settings.
EXACT — Any result that is not a whole number is displayed in a
fractional or symbolic form ( 1/2 , p, 2 , etc.).
Formats of Displayed Results
A result may be calculated and displayed in any of several
formats. This section describes the
TI - 89 / TI - 92 Plus modes
and their settings that affect the display formats. To check or
change your current mode settings, refer to page 40.
Pretty Print Mode
Exact/Approx Mode
Note: By retaining fractional
and symbolic forms, EXACT
reduces rounding errors that
could be introduced by
intermediate results in
chained calculations.
Shows whole-number results.
Shows simplified fractional results.
Shows symbolic p .
Shows symbolic form of roots that
cannot be evaluated to a whole
number.
Press ¥ ¸ to temporarily
override the EXACT setting and
display a floating-point result.