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Finding Adjoint of a 3x3 Matrix Video Lecture | Mathematics (Maths) Class 12 - JEE

204 videos|288 docs|139 tests

Timeline

00:03 How to find Adjoint of a 3x3 Matrix?
00:30 Matrix of Cofactors of all Elements
01:37 Transpose of a Matrix
02:07 Trick to find Adjoint of a 2x2 Matrix
03:16 Find Adjoint of a Matrix (Example)
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FAQs on Finding Adjoint of a 3x3 Matrix Video Lecture - Mathematics (Maths) Class 12 - JEE

1. What is the adjoint of a 3x3 matrix?
Ans. The adjoint of a 3x3 matrix is obtained by taking the transpose of the cofactor matrix of the original matrix.
2. How do you find the cofactor matrix of a 3x3 matrix?
Ans. To find the cofactor matrix of a 3x3 matrix, you need to calculate the determinant of each 2x2 submatrix formed by removing a row and a column from the original matrix, and then apply the alternating sign pattern to these determinants.
3. Can you explain the process of finding the adjoint of a 3x3 matrix step by step?
Ans. Sure! To find the adjoint of a 3x3 matrix, follow these steps: 1. Find the cofactor matrix by calculating the determinants of each 2x2 submatrix. 2. Apply the alternating sign pattern to the determinants in the cofactor matrix. 3. Take the transpose of the cofactor matrix to obtain the adjoint of the original matrix.
4. What is the significance of finding the adjoint of a 3x3 matrix?
Ans. The adjoint of a 3x3 matrix plays an important role in various mathematical calculations, such as finding the inverse of a matrix. It is also used in solving systems of linear equations and in applications of linear algebra in fields like physics and engineering.
5. Is it possible to find the adjoint of a non-square matrix?
Ans. No, the adjoint of a matrix can only be found for square matrices. The adjoint is a concept related to determinants, and determinants are only defined for square matrices. So, a non-square matrix does not have an adjoint.
204 videos|288 docs|139 tests
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