Osgood, William F. (William Fogg), 1864-1943, Graustein, William C. (William Caspar), 1888-1941, joint author · New York : The Macmillan Company · leaf 280
le ~has a lixed base AB and itsvertex F moves on an indefinitestraight line L, parallel to thebase. Tind the locus of thepoint of intersection P of thealtitudes. Here the motion of P is •governed by tico essential conditions ; first, by the motion ofV, and secondly, by the fact that P is the point… … A: (-a,0) O C B:{a,0)Fig. 1 262 ANALYTIC GEOMETRY in substance equivalent to a single condition, which, whenexpressed analytically, would give the equation of thelocus. Our problem, then, is to reduce the two conditions to a singlecondition. This it is, in general, very difficult to do…
