HP 39gs Master Guide

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Complex numbers on the hp 39gs & hp 40gs can be entered in either of two ways. Firstly, in the same way
as they are commonly written in mathematical workings: a + bi. Secondly, as an ordered pair: (a,b).
+
For example,
32i
could be entered into the calculator exactly as it is
written, with the ‘i’ obtained using
SHIFT ALPHA to get a lowercase i.
Alternatively you can enter it directly as an ordered pair.
As soon as you press
ENTER, the calculator immediately converts the a + bi form into an ordered pair. The
History retains the original in case you need to
it later for re-use.
The exception is when you enter a complex number in polar form using
the
(angle) sign on the keyboard (above the button). When you
do this the calculator converts into the two other common forms of rcis
format and (a,b) format as shown right. In the example right, the lowest
line shows how the number was been entered. The first two lines show
how the result is stored in the History as rcis format and as (a,b) format.
Complex numbers can be used with all trigonometric and hyperbolic function, as well as with matrices, lists
and some real-number and keyboard functions.
Just as real numbers can be stored into the alphabetic memories A to Z,
there are 10 special memories
Z1,Z2..Z9,Z0 which are provided to
store complex numbers.
186

HP 39gs Specifications

General

Type	Scientific
Form factor	Pocket
Product color	Gray
Internal memory	0.256 MB

Weight and Dimensions

Weight	249 g
Dimensions (WxDxH)	187 x 94 x 31 mm