Hp 33s User Manual download pdf (Page 97)

Entering and Evaluating Equations 6–5

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



, 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 "

" 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

(on the

key) to

separate them.

If the function is followed by other operations, press

to complete the

function arguments.

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Hp 33s User Manual Page 97