Education Technology

# Knowledge Base

## Solution 11713: Calculating the Determinant of a Matrix Using a TI-82, TI-83 Family or TI-84 Plus Family Graphing Calculator.

### How do I calculate the determinant of a matrix using the TI-82, TI-83 family, or TI-84 Plus family?

The instructions below will demonstrate how to find the determinant of a matrix using the TI-82, TI-83 family or TI-84 Plus family .

Example: For the following matrix A, find the determinant.

Solution:

To enter the matrix:

1) Press [MATRX] (Press [2nd] [MATRX] on the TI-83 Plus family and TI-84 Plus family )
2) Scroll to Edit
3) Press [1] to access matrix A
4) Input the dimensions [2] [ENTER] [2] [ENTER]
5) Input the matrix entries
6) Exit the matrix editor by selecting [2nd] [QUIT]

Find the determinant using the det function:

1) Press [MATRX] (Press [2nd] [MATRX] on the TI-83 Plus family and TI-84 Plus family )
2) Scroll to MATH
3) Press [1] [det(] (Press [2nd] [MATRX] for the TI-83 Plus family and TI-84 Plus family )
4) Press [1] [)] [ENTER] the determinant is 10.

Please see the TI-82, TI-83 family, and TI-84 Plus family guidebooks for additional information.