New Vizzy: Angle between vectors

in the new vizzy's math section, there's a bar that should return the angle between two vectors in radians, but it seems like it returns them in degrees (honestly i like that better).
TEST SETTING :
subtracted craft position vector - target position vector and used the NORM of that at one side and at the other side i put the NORM of serfuce velocity vector. returned 90 degrees when passed overhead target.