Casio fx-991EX User Manual

fx-991EX Quick Start Guide14
Enter the matrix values by pressing
3pz6p8p2p.
To perform matrix calculations, like addition, subtraction, and
multiplication, follow these simple commands.
To recall the name of a matrix, press i.
To add A + B, press 3(MatA)+i4(MatB)p.
The solution matrix is displayed in the window and can be viewed
without scrolling.
To calculate the determinant of the matrix, press
iR2(Determinant) i3(MatA))p.
Matrices can be used to solve a system of equations.
Take the following equation with 3 unknowns:
Enter the coefcient matrix as Matrix A and the solution matrix as Matrix B.
MATRIX

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