Knowledge Base

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

How do I calculate the determinant of a matrix using the TI-83 Plus, TI-84 Evo, or TI-84 Plus Family Graphing Calculator?

The instructions below will demonstrate how to find the determinant of a matrix:

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

 

Solution:

To enter the matrix:

1) Press [2nd] [MATRX]
2) Press [Left Arrow] to select 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 [2nd] [MATRX]
2) Press [Right Arrow] to select MATH
3) Press [1] to select det(
4) Press [2nd] [MATRX]
5) Press [1] [)] [ENTER] the determinant is 10.

Please see Texas Instruments guidebooks for additional information.