Plane and solid analytic geometry; an elementary textbook (1905)
Ashton, Charles H. (Charles Hamilton), 1866- · New York, C. Scribner's Sons · leaf 70
Draw MN through Pj parallel to AB and continue theperpendicular OH to meet it at K. The equation of MNwill be X cos c- -\- y sin a — jt?^ = 0, where f^ may be either positive or negative. For, as thevalue of a is fixed and as MN can be any line j^arallel toAB^ it may be on the opposite side of the…
Geometry, Analytic
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