Types of Matrices: Part 1

# Types of Matrices: Part 1 Video Lecture | Mathematics (Maths) Class 12 - JEE

## Mathematics (Maths) Class 12

204 videos|288 docs|139 tests

## FAQs on Types of Matrices: Part 1 Video Lecture - Mathematics (Maths) Class 12 - JEE

 1. What is a matrix and what are its components?
Ans. A matrix is a rectangular array of numbers, symbols, or expressions arranged in rows and columns. The components of a matrix are its individual elements that make up the rows and columns.
 2. What are the different types of matrices based on their dimensions?
Ans. Matrices can be categorized into different types based on their dimensions. Some common types include square matrices (having the same number of rows and columns), row matrices (with only one row), column matrices (with only one column), and rectangular matrices (having different numbers of rows and columns).
 3. Can you explain the concept of a zero matrix?
Ans. A zero matrix is a matrix where all the elements are zero. It is denoted by the symbol O or 0. Regardless of its dimensions, a zero matrix will have all its elements equal to zero.
 4. What is an identity matrix and what are its properties?
Ans. An identity matrix is a square matrix where all the elements on its main diagonal (from top-left to bottom-right) are equal to 1, and all other elements are zero. It is usually represented by the symbol I or the identity matrix of order n. The main properties of an identity matrix include: any matrix multiplied by the identity matrix gives the same matrix as the result, and the identity matrix is the multiplicative identity for matrices.
 5. How are symmetric and skew-symmetric matrices different from each other?
Ans. A symmetric matrix is a square matrix where the elements are symmetric with respect to the main diagonal. In other words, if A is a symmetric matrix, then A[i][j] = A[j][i] for all elements. On the other hand, a skew-symmetric matrix is a square matrix where the elements are symmetric with respect to the main diagonal but differ in sign. In other words, if A is a skew-symmetric matrix, then A[i][j] = -A[j][i] for all elements.

## Mathematics (Maths) Class 12

204 videos|288 docs|139 tests

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