I would like to get the rotation angles created by the effect of an existing object (Undo is not possible):
Effect -> 3D -> Rotate...
I would like to get the rotation angles created by the effect of an existing object (Undo is not possible):
Effect -> 3D -> Rotate...
Use guidelines
You can rotate a guideline to measure the angle of the "effect" you specified. It is a crude solution but it is better than approximating.
To rotate a guideline: rotate guidelines