Mathematics for engineering students, Analytical geometry and calculus (1907)
Keller, S. S. (Samuel Smith), 1867-1923, Knox, W. F., [from old catalog] joint author · New York : D. Van Nostrand company · leaf 256
thatthe point Pt has passed through the angle e. This anglee is called by electrical engineers the lead; when negativeit is known as the lag. The term Phase is used to denote the interval of timethat has elapsed since the point P passed through its initialposition at A, and hence e is often called… … Fig. rg. Consider the area ABDC, call this area u, let CF = Ax,then Au = CFHD, and Ay = GH.Now CDGF < Au < CEHF; but CDGF = y . Ax, and CEHF = FH . Ax. Hence y . Ax < Aw < FHA*. .*• y < -r- < FH. Ax Now the smaller A# becomes, the more nearly will y Auand FH approach — in value;…
Geometry, Analytic · Calculus
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