A treatise on special or elementary geometry (1877)
Olney, Edward, 1827-1887, Olney, Edward, 1827-1887. Elements of trigonometry, plane and spherical · New York : Sheldon · leaf 338
sing through P, and a point in the polar. The locus of C is required. Draw PL through the centre, and let fall the perpendicular CC. Draw AL, AH, ACT, and CB. Since AC :CB:: AP: BP, CP bisects the angle BCF, the exterior angle of the triangle ^^ ACB (?); hence, as LAH is a right angle, AL (^./… … Fig. 508. 1000. Cor. 1.—Si7ice, as the secant revolves, the points a a?id Bwill vanish in C, C is the point at which a tangent from the pole ptouches the circle. 1001. CoR. 2.—Draioing OC, CP, we see that OC (or oh)= 0C X OP. 320 INTRODUCTION TO MODERN GEOMETRY. 1002. CoR. 3.—The jjolar of a point…
Geometry · Trigonometry
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