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Entering expressions – Texas Instruments TI-73 EXPLORER User Manual

Page 21

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Chapter 1: Operating the TI

N73

15

7301ENG.DOC CH1 Operating the TI-73, English Julie Hewlett Revised: 07/29/98 11:55 AM Printed: 05/19/99

8:58 AM Page 15 of 24

Enter the

CATALOG

and go directly to the section starting with

L.

1. Go to the

CATALOG.

- |

2. Select

L

from Text editor.

- t

L

b

Selecting

¨

by pressing b pastes it to the previous screen,

just as if you had selected it from a menu.

Entering Expressions

An expression is a group of numbers, variables, functions and

their arguments, or a combination of these elements that

evaluates to a single answer. Instructions cannot be used in

expressions. An expression is completed when you press

b, regardless of the cursor location.
On the TIN73, you enter an expression in the same order as

you would write it on paper. The entire expression is

evaluated according to the Equation Operating System (EOS

™

)

rules (which is explained in detail in Appendix B: Reference

Information), and the answer is displayed.

Calculate the area (A) of a circle whose radius (R)=3 using the

formula A=pR

2

. Then use the area to calculate the volume (V)

of a cylinder whose height (H)=4. Use the formula V=AQH.

- l :
- „

3

6 b

³

³