Schmall, Charles Nelson. [from old catalog] · New York, D. Van Nostrand company · leaf 22
co-ordinates wedetermined a point by its distances from the axes. We can,however, fix a point by polar co-ordinates, in which we take accountof its distance from a given fixedpoint, called the pole, and its di-rection from a fixed line calledthe polar axis or initial line.Thus, let 0 be the pole,… … ANALYTICAL GEOMETRY stitute the polar co-ordiuates of the point P. The radius vec-tor is usually denoted by the Greek letter p, and the puint P is designated in polar co-ordi-nates by (p, 0). The vectorialangled is positive or negativeaccording as we suppose theline OP to revolve in…
Geometry, Analytic
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