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Why Do We Use Rotation Tool? [Solved]

The Rotate tool can rotate objects in the drawing. Double-clicking the tool when an object is selected opens the Rotate Object dialog box as described in Custom Rotation. The Rotate tool can rotate, or rotate and duplicate the selected objects about an axis, or align the objects relative to another object.

Adobe Illustrator Tutorial: Perfect Rotation Object | How to Use the Rotate Tool in Illustrator [HD]

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Rotation Tool - WTF After Effects Ep. #3

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Quaternions and 3d rotation, explained interactively

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