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Diagonal matrices

aij=0 (i≠j)a_{ij} = 0 \ (i \neq j)
aija_{ij}
the entry in row i, column j

A diagonal matrix has zeros everywhere off the leading diagonal; the diagonal entries themselves are unrestricted.

14
questions use it
11
of them past-year
2023–2026
years it has appeared
0%
rated HARD
2
exams
Matrices & Determinants notesOpen all 14 in the paper builder

Used alongside

How often each of these appears in the same solution as this one.

14 questions whose solution uses this

Every one was read individually — a question is here because its solution invokes this, not because the stem mentions it.

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Showing 14 of 14 questions — easiest first, then oldest paper first.

  • #1NDA → Mathematics → Matrices & Determinants → Special Matrices — Skew-Symmetric, Diagonal, Idempotent, Orthogonal, Rotation

  • #2NDA → Mathematics → Matrices & Determinants → Special Matrices — Skew-Symmetric, Diagonal, Idempotent, Orthogonal, Rotation

  • #3CBSE Class 12 → Mathematics → Matrices → Order and Types of Matrices

    Questions number 19 and 20 are Assertion and Reason based questions. Two statements are given, one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer from the codes (A), (B), (C) and (D) as given below.

  • #4CBSE Class 12 → Mathematics → Matrices → Multiplication of Matrices

  • #5CBSE Class 12 → Mathematics → Matrices → Order and Types of Matrices

  • #6CBSE Class 12 → Mathematics → Matrices → Symmetric and Skew-Symmetric Matrices

  • #7CBSE Class 12 → Mathematics → Matrices → Symmetric and Skew-Symmetric Matrices

  • #8CBSE Class 12 → Mathematics → Matrices → Order and Types of Matrices

    ASSERTION – REASON BASED QUESTIONS Direction : Question number 19 and 20 are Assertion (A) and Reason (R) based questions. Two statements are given, one labelled Assertion (A) and other labelled Reason (R). Select the correct answer from the options (A), (B), (C) and (D) as given below :

  • #9CBSE Class 12 → Mathematics → Determinants → Determinant and its Properties

  • #10CBSE Class 12 → Mathematics → Matrices → Order and Types of Matrices

  • #11CBSE Class 12 → Mathematics → Matrices → Order and Types of Matrices

  • #12NDA → Mathematics → Matrices & Determinants → Matrix Operations, Polynomials, and Equations

  • #13NDA → Mathematics → Matrices & Determinants → Special Matrices — Skew-Symmetric, Diagonal, Idempotent, Orthogonal, Rotation

  • #14CBSE Class 12 → Mathematics → Matrices → Multiplication of Matrices

    Questions number 19 and 20 are Assertion and Reason based questions. Two statements are given, one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer from the codes (A), (B), (C) and (D) as given below.

Every identity this chapter tests, with its own question set.

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