Texas Instruments TI-89 Titanium User Manual page 270

Combining Multiple Units
You may need to combine two or more units from different categories.
For example, suppose you want to enter a
velocity in meters per second. In the UNITS
dialog box, however, the
does not contain this unit.
You can enter meters per second by
combining and
_m
categories, respectively.
Time
Create a user-defined unit for frequently used combinations.
Note:
Constants and Measurement Units
category
Velocity
from the
_s Length
3 9.8_m/_s
†
and
Combine the units _m
and _s. There is no
pre-defined m/_s unit.
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