Matrix Operations - Determinants, Co-factors, Adjoints, Inverse

This unit focuses on understanding how to find the inverse of a matrix using its adjoint, and will teach the following skills:

• Determine the adjugate of a matrix
• Calculate cofactors of a matrix
• Construct the cofactor matrix
• Calculate minors of a 3 by 3 matrix
• Identify the minor associated with a matrix element
• Calculate the inverse of a 3 by 3 matrix using cofactors
• Construct the matrix of minors
• Determine the sign of a cofactor from its position
• Calculate the inverse of a 2 by 2 matrix