x^3 + Cos((Theta))*x^2 + E^(I*(Theta))*Cos((Theta)) x + E^(
I(Theta))=0
and
x^3 + I*Sin((Theta))

*x^2 + E^(I*(Theta))

*I*Sin((Theta))

*x – E^(*

I(Theta))=0

I

They come from these two matrices, and I’m trying to figure out its eigenvectors, but I can’t figure out its eigenvalues.

( {

{0, 0, E^(I*(Theta))},

{-Cos((Theta)), -I

*Sin((Theta)), 0},*

{-ISin((Theta)), -Cos((Theta)), 0}

{-I

} )

and

( {

{-Cos((Theta)), -I

*Sin((Theta)), 0},*

{0, 0, E^(I(Theta))},

{0, 0, E^(I

{-I*Sin((Theta)), -Cos((Theta)), 0}

} )

Both equations are written in the corresponding code, which can be opened with the appropriate mathematical software to view the original format.

Thanks!