Analytic geometry, for technical schools and colleges (1897)
Lambert, Preston Albert, 1862-1925 · New York, Macmillan · leaf 188
nates of any point F inspace. Call the distance from the origin 0 to the point r,the angle made by OP with itsprojection OP on the XF-plane0, the angle made by the projec-tion OP with the X-axis <^. r,(fi, 6 are the polar coordinates ofthe point P. From the figure OP = r ■ cos e, X = OP ■ cos… … 174 ANALYTIC GEOMETllY From the figure are also obtained r ={x- + 9/ + z^)^, sin^ =-,tan 4> =-, formulas which express the polar coordinates of anypoint in space in terms of the rectangular coordinates of thesame point. Problems. — 1. Locate the points whose polar coordinates are 5, 15°,60 ; 8,…
Geometry, Analytic
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