Explain this example

now as you know the eigenvalues of matrix A of my solution. the eigenvalues of matrix B would be π/2 time the eigenvalues of matrix A. thats why I multiplied the eigenvalues of A b...

The given matrix is orthogonal, and skew symmetric. orthogonal matrices have Eigen values whose modulus is (1). and it is skew symmetric as well, which says it's eigenvalues must b...

when we will find out the eigen value of the matrix..... multiply it by simply pi/2

A complete solution to your doubt.

dear, we can find out it's eigen value directly...... don't go tough method....... it's 4×4 matrix....we can solve it by this method see attached

just like previous one evry matrix satify by its eigen value if we multiply it both side by k it won't effect