Plane and solid analytic geometry; an elementary textbook (1901)
Ashton, Charles H. (Charles Hamilton), 1866- · New York, C. Scribner's sons · leaf 56
and show that they bisect each other. 9. What system of lines is represented by the equation -4-^=1, if we keep a constant and allow b to vary ? if we keep b constant and allowa to vary ? 26. Line determined bya point and its direction. — If the second condi-tion mentioned in Art.22 be given, — a… … Fig. 29. 38 ANALYTIC GEOMETRY [Cn. IV, § 27 the positive direction of the JT-axis measured in the posi-tive direction of rotation. In the triangle KPXP, |J = taniOV>. But for all positions of P, KP = y-yv P1K= x - xv and tan KPXP = tan 7. Hence i = tan7, x — x1or y — y1 — tan 7 • (x — x^). Tan 7…
Geometry, Analytic
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