HP (Hewlett-Packard) HP 33s Calculator User Manual


 
Entering and Evaluating Equations
6–5
File name 33s-English-Manual-040130-Publication(Edition 2).doc Page : 388
Printed Date : 2004/1/30 Size : 13.7 x 21.2 cm
Numbers in Equations
You can enter any valid number in an equation except fractions and numbers that
aren't base 10 numbers. Numbers are always shown using ALL display format,
which displays up to 12 characters.
To enter a number in an equation, you can use the standard number–entry keys,
including
Ë
,
z
, and
}
. Press
z
only after you type one or more digits.
Don't use
z
for subtraction.
When you start entering the number, the cursor changes from "
" to "_" to show
numeric entry. The cursor changes back when you press a nonnumeric key.
Functions in Equations
You can enter many HP 33s functions in an equation. A complete list is given
under “Equation Functions” later in this chapter. Appendix G, "Operation Index,"
also gives this information.
When you enter an equation, you enter functions in about the same way you put
them in ordinary algebraic equations:
In an equation, certain functions are normally shown between their
arguments, such as "+" and "
÷
". For such
infix operators, enter them in an
equation in the same order.
Other functions normally have one or more arguments after the function
name, such as "COS" and "LN". For such
prefix functions, enter them in an
equation where the function occurs — the key you press puts a left
parenthesis after the function name so you can enter its arguments.
If the function has two or more arguments, press
å
(on the
<
key) to
separate them.
If the function is followed by other operations, press
º
|
to complete the
function arguments.