Casio fx-991EX User Manual

fx-991EX Quick Start Guide 11
Complex Number calculations can be executed in the Complex Mode.
From the Main Menu, use the arrow keys to highlight the
Complex icon, then press p or press 2.
In Complex Mode, operations can be carried out using
the imaginary unit U. To add complex numbers, press
2+3bU+5-7bUp.
Complex numbers that are multiplied are displayed in
complex format. Press (3-2bU)
(5+6bU)p.
The argument of the complex number 1+2i, can be found by
taking the arctan (y/x) = 63.4349° or by using the Argument
command.
Press i1(Argument)1+2bU)p.
COMPLEX

Casio fx-991EX Specifications

General

Type	Scientific
Cover	No
Form factor	Pocket
Control type	Buttons
Product color	Black, White
Battery type	LR44
Power source	Battery/Solar
Number of batteries supported	1
Digits	16 digits
Display type	LCD
Display resolution	192 x 63 pixels
Display number of lines	2 lines
Display number of characters	16
Storage media type	-
Operation	552
Conversion between	Decimal, Fraction, Percent
Convert angles from degrees to	Gradian, Radian
Random number/integer generator	Yes

Weight and Dimensions

Depth	165.5 mm
Width	77 mm
Height	11.1 mm
Weight	90 g