3D Custom Rotation
The precision of the rotation values that can be entered (degrees, minutes, and/or seconds) depends on the Units setting.
To rotate at custom angles in 3D:
1.
2.
Select Modify > Rotate > Rotate 3D.
The Rotate Object in 3D dialog box opens. Specify the rotation parameters.
 
Select whether the rotation axis will be based on the Ground Plane or the Working Plane, and about which axis point
3.

Common Functions and Utilities : Rotating Objects : 3D Custom Rotation

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