Quaternions and spatial rotation of a circle representing a particular rotation angle will be half of the angle represented by that rotation, since as the point is moved from the north to south pole, the latitude ranges from zero to 180 degrees, while the angle of rotation ranges from 0 to 360 degrees. (the "longitude" of a point then represents a particular axis of rotation.) Note however that this set of rotations is not closed under composition. Two successive rotations with axes in the "xy" plane will not necessarily give a rotation whose axis lies in the "xy" plane, and thus cannot be represented
Silk Degrees "hit the R&B charts in a big way with the addictive, sly "Lowdown" [...] and expressed his love of smooth soul music almost as well on the appealing "What Can I Say."" However, Henderson stated that "Scaggs was essentially a pop/rocker, and in that area he has a considerable amount of fun." He concluded: "Though not remarkable, the ballads have more heart than most of the bland material dominating that format." On February 27, 2007, "Silk Degrees" was reissued by Legacy Records with three bonus tracks recorded live at the Greek Theatre on August 15, 1976. Silk Degrees Silk Degrees