Texas Instruments TI-92 Getting Started page 6

A significant difference between the TI-92 graphing calculators and most scientific calculators is that TI-92 requires
the argument of a function after the function, as you would see in a formula written in your textbook. For example,
on the TI-92 you calculate 16 by pressing the keys 2nd
Here are keystrokes for basic mathematical operations. Try them for practice on your TI-92.
Expression
2 2
3 + 4
2 1
3
ln 200
5
2.34 · 10
Technology Tip: Note that if you had set the calculation mode to either AUTO or EXACT (the last line of page 2 of
the MODE menu), the TI-92 would display
fractions and exact numbers or decimal approximations. The AUTO mode will give exact rational results whenever
all of the numbers entered are rational, and decimal approximations for other results.
Additional mathematical operations and functions are available from the MATH menu. Press 2nd MATH to see the
various sub-menus. Press 1[Number] or just ENTER to see the options available under the Number sub-menu. You
will learn in your mathematics textbook how to apply many of them. As an example, calculate the remainder of 437
when divided by 49 by pressing 2nd MATH 1[Number] then either A[remain(] or
ENTER; finally press 437 , 49 ) ENTER to see 45. To leave the MATH menu (or any other menu) and take no
other action, press 2nd QUIT or just ESC.
Note that you can select a function or a sub-menu from the current menu by pressing either
is highlighted and then ENTER, or by pressing the number or letter corresponding to the function or sub-menu. It is
easier to press the letter A than to press
The factorial of a non-negative integer is the product of all the integers from 1 up to the given integer. The symbol
for factorial is the exclamation point. So 4! (pronounced four factorial) is 1 · 2 · 3 · 4 = 24. You will learn more
about applications of factorials in your textbook, but for now use the TI-92 to calculate 4! Press these keystrokes: 4
2nd MATH 7[Probability] 1[!] ENTER.
On the TI-92 it is possible to do calculations with complex numbers. To enter the imaginary number i, press 2nd i.
For example, to divide 2 + 3i by 4 – 2i, press ( 2 + 3 2nd i ) ÷ (4 – 2 2nd i ) ENTER. The result is 0.1 + 0.8i
(Figure 5.9).
To find the complex conjugate of 4 + 5i press 2nd MATH 5[Complex] ENTER 4 + 5 2nd i ) ENTER (Figure 5.9).
6
Graphing Technology Guide: TI-92
Keystrokes
( 3 ∧ 2 + 4 ∧ 2) ENTER
2nd
-1
2 + 3 2nd x ENTER
LN 200 ) ENTER
2.34 × 10 ∧ 5 ENTER
7 for 2 and 2 ln(5) + 3 ln(2) for ln 200. Thus, you can use either 1
3 3
nine times to get the remain( function.
Figure 5.8: MATH menu and Number sub-menu
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16 ) in that order.
Display
2.333333333
5.298317367
234000
5
until the desired item