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Unformatted text preview: QP lies in the plane = ; its length is, by assumption, b , and if we denote the angle it makes with the radial line O Q by (igure 3.18 ), then we have x y z Q P a b Q P igure 3.18: Parametrization of Torus QP = ( b cos ) v + ( b sin ) k where v = (cos ) + (sin ) is the horizontal unit vector making angle with the x-axis. Since O Q = a v = ( a cos ) + ( a sin )...
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- Fall '08