Texas Instruments TI-83 Quick Start Guide

3. To find the determinant of a matrix, follow these steps
a. Press [2
nd
] [X
-1
] to enter the Matrix Menu
b. Tab over to the MATH menu
c. Press [1] det(
d. Press [2
nd
] [X
-1
] to enter the Matrix Menu
e. While “NAMES” is highlighted, press the number of the matrix you wish to use.
f. Press [ENTER] to find the determinant.
4. To find the inverse of a matrix, follow these steps
a. Press [2
nd
] [X
-1
] to enter the Matrix Menu
b. While “NAMES” is highlighted, press the number of the matrix you wish to use.
c. Once the matrix shows on the home screen, press the [X
-1
] button
(without pressing [2
nd
])
d. Press [ENTER] to find the inverse.
e. To find the exact value of the inverse (in fraction form), now press [MATH][1] >Frac.
f. Press [Enter] to have the entries written in fraction form.
g.
Section II. Use Your Calculator to Find the Product of Each of the Following.
1. A
-1
2. C
-1
3. det[B] 4. det[D]
5. det[E] 6. E
-1
7. C
-1
D 8. D
-1
D
Assignment: Assignment #9 – Working with Matrices in the Calculator

Texas Instruments TI-83 Specifications

General

Brand	Texas Instruments
Model	TI-83
Category	Calculator
Language	English