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6–6 Entering and Evaluating Equations
File name 32sii-Manual-E-0424
Printed Date : 2003/4/24 Size : 17.7 x 25.2 cm
To enter a number in an equation, you can use the standard number–entry
keys, including
,
_
, and
`
. Press
_
only after you type one or
more digits. Don't use
_
for subtraction.
When you start entering the number, the cursor changes from "
¾
" to "_" to
show numeric entry. The cursor changes back when you press a nonnumeric
key.
Functions in Equations
You can enter many HP 32SII functions in an equation. A complete list is
given tinder "Equation Functions" later in this chapter. Appendix F,
"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 its
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
o
(on the
f
key) to separate them.
If the function is followed by other operations, press
{
]
to complete
the function arguments — otherwise, you don't have to add the trailing
")".
If the first key in an equation is a function from the top row of keys on the
calculator, and if the displayed equation has the
annunciator turned on,
you have to press
{
[SCRL] first to turn off the annunciator. (See
"Displaying and Selecting Equations" later in this chapter for more
information.)