Performing Computations - Texas Instruments TI-89 Manual Book

Performing Computations

This section provides several examples for you to perform that demonstrate some of the
computational features of the
cleared by pressing ƒ and selecting 8:Clear Home, before performing each example, to
illustrate only the results of the example's keystrokes.
Steps
Showing Computations
1. Compute and display the
sin(p/4)
result in symbolic and numeric
format.
To clear the history area of previous
calculations, press ƒ and select
8:Clear Home.
Finding the Factorial of
Numbers
1. Compute the factorial of several
numbers to see how the
handles very
TI-89 / TI-92 Plus
large integers.
To get the factorial operator (!), press
2 I , select 7:Probability , and
then select 1:! .
Expanding Complex Numbers
3
1. Compute to see how the
(3+5i)
handles
TI-89 / TI-92 Plus
computations involving complex
numbers.
Finding Prime Factors
1. Compute the factors of the
rational number 2634492
You can enter "factor" on the entry
line by typing FACTOR on the
keyboard, or by pressing „ and
selecting 2:factor( .
2. (Optional) Enter other numbers
on your own.
8 Chapter 1: Getting Started
TI-89 / TI-92 Plus.
³
TI.89
Keystrokes
2 W 2 T
e 4 d ¸
¥ ¸
5 2 I 7 1
¸
2 0 2 I 7 1
¸
3 0 2 I 7 1
¸
c 3 « 5 2 )
d Z 3 ¸
„ 2
. 2 6 3 4 4 9 2 d
¸
The history area in each screen was
›
TI.92 Plus
Keystrokes
W 2 T
e 4 d ¸
¥ ¸
5 2 W ¸
2 0 2 W ¸
3 0 2 W ¸
c 3 « 5 2 )
d Z 3 ¸
„ 2
2 6 3 4 4 9 2 d
¸
Display