| 1. | Otherwise, there will be no axis-plane of rotation.
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| 2. | I see that JohnBlackburne is the author of Plane of rotation.
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| 3. | The plane of rotation is perpendicular to the strings when not tangled.
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| 4. | In more than three dimensions planes of rotation are not always unique.
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| 5. | In any three dimensional rotation the plane of rotation is uniquely defined.
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| 6. | Lead angle is the angle between the helix and a plane of rotation.
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| 7. | In gears with parallel axes, the transverse and the plane of rotation coincide.
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| 8. | A double rotation has two angles of rotation, one for each plane of rotation.
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| 9. | Hence there are six planes of rotation.
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| 10. | Where the matrices are 2-by-2 rotation matrices in orthogonal planes of rotation.
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