Plane and solid analytic geometry; an elementary textbook (1901)
Ashton, Charles H. (Charles Hamilton), 1866- · New York, C. Scribner's sons · leaf 222
(p1? «1? /?1? yx) and (p2, «2> fi-2> 72) is pi + pi — 2 p\p-2 (cos «x cos a2 -f- cos /3l cos /?2 4- cos y1 cos y2). 8. A line makes an angle of G0° with the X-axis, and 45°with the Y-axis. What angle does it make with the Z-axis ? Ch. I, § 7] COORDINATE SYSTEMS. THE POINT 203 7. Spherical… … Eig. 6. tance p from the origin to the point ; the angle 6 whichthe plane ZOP makes with the fixed plane ZOX; and theangle <j> which OP makes Avith OZ. The line OZ is called the polar axis, and the point 0 thepole. About 0 as a centre describe a sphere with OP asradius. The plane ZOP will…
Geometry, Analytic
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