Rotate a mc using matrix

Hello everyone!
I have this matrix and i want to know the value of the rotation in degrees…
here is the matrix:

cos(0.898834228515625) -sin(-0.438278198242188) 0
sin(0.438278198242188) cos(0.898834228515625) 0
0 0 1

How do i apply that to rotate my mc? And how do i know the
resulting angle of that?

Kind regards.
Leo.