HP HP-28S User Manual

2
Doing Arithmetic
There are two ways to do arithmetic on the HP-28S. You can do
arithmetic using the stack, as you did in the previous chapter, or you
can enter an expression representing the calculation. In the previous
chapter you calculated:
(15
+ 23) x sin 30°
Here's how to make the same calculation using an expression.
Clear
the stack and select the TRIG menu .
• , CLEAR II TRIG I
Start the expression.
~
The cursor changes, indicating Algebraic Entry mode. You'll see the ef-
fects
of this entry mode as you key in the expression.
Key
in the first part of the expression.
~----------------------~
rn 15 [B 23 .CD I;
34 2: Doing Arithmetic
1(15+23)~
IImImI:llIIlBIllImlmC:ll'lllll3
I

HP HP-28S Specifications

General

Brand	HP
Model	HP-28S
Category	Calculator
Language	English