Texas Instruments TITANIUM TI-89 - Manual (Page 167)

Operating the Calculator 167
EXACT — Any result that is not a whole number is displayed in a fractional or symbolic
form (1/2, p, , etc.).
Note: By retaining fractional and symbolic forms, EXACT reduces rounding errors
that could be introduced by intermediate results in chained calculations.
2
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
8 ¸
to temporarily override
the EXACT setting and display a
floating-point result.