Plane and solid analytic geometry; an elementary textbook (1904)
Ashton, Charles Hamilton, 1866-1936 · New York, C. Scribner's Sons · leaf 232
nates are (ply «1? /?2, yx) and (p2, ci2, /?2, 72) is p\ + P22 — 2 pip2 (cos % cos «, + cos /?! cos (3.2 + cos yx cos y2). 8. A line makes an angle of 60° with the X-axis, and 45Dwith the y-axis. What 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 <p 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…
Geometry, Analytic
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