The diagonal elements of a skew symmetric matrix are all
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 0
A matrix A is skew symmetric when \(A^T = -A\), that is, \(a_{ji} = -a_{ij}\) for all i, j.
For a diagonal element take \(j = i\):
\(a_{ii} = -a_{ii}\)
\(2a_{ii} = 0,\quad a_{ii} = 0\)
So every diagonal element is 0.
NCERT (2026-27 edition):
Symmetric and Skew Symmetric Matrices
