Plane and solid analytic geometry; an elementary textbook (1905)
Ashton, Charles H. (Charles Hamilton), 1866- · New York, C. Scribner's Sons · leaf 232
oordinates are (pi, a^, jSi, 71) and (pa? «2j A? T2) is pi^ + p2 — 2 pip2 (cos «i cos «2 + cos ^1 cos /?2 + cos yi cos 72). 8. A line makes an angle of G0° with the X-axis, and 45with the F-axis. AVhat angle does it make with the Z-axis ? Ch. I, §7] COORDINATE SYSTEMS. THE POINT 215 7. Spherical… … FiG. 6. tance p from the origin to the point ; the angle 0 whichthe plane ZOP makes with the fixed plane ZOX; and theangle (f) which OP makes with 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 intersect…
Geometry, Analytic
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