HP 33S User Manual

Entering and Evaluating Equations
6–1
File name 33s-English-Manual-040130-Publication(Edition 2).doc Page : 388
Printed Date : 2004/1/30 Size : 13.7 x 21.2 cm
6
Entering and Evaluating Equations
How You Can Use Equations
You can use equations on the HP 33s in several ways:

For specifying an equation to evaluate (this chapter).

For specifying an equation to solve for unknown values (chapter 7).

For specifying a function to integrate (chapter 8).
Example: Calculating with an Equation.
Suppose you frequently need to determine the volume of a straight section of pipe.
The equation is
V = .25
π
d
2
l
where d is the inside diameter of the pipe, and l is its length.
You could key in the calculation over and over; for example, .25
Ï º
j ¸
2.5
= ¸
16
¸
calculates the volume of 16 inches of 2
1
/
2
–inch
diameter pipe (78.5398 cubic inches). However, by storing the
equation, you get
the HP 33s to "remember" the relationship between diameter, length, and
volume — so you can use it many times.
Put the calculator in Equation mode and type in the equation using the following
keystrokes:
Keys: Display: Description:
º d

or the current equation

Selects Equation mode, shown
by the
EQN annunciator.


HP 33S Specifications

General

Type	Scientific
Form factor	Pocket
Product color	Silver
Digits	10 digits
Display number of lines	2 lines
Keyboard type	Alphanumeric
Menus and prompts	Yes

Weight and Dimensions

Dimensions (WxDxH)	157 x 16 x 81 mm