Tanner, J. H. (John Henry), b. 1861, Allen, Joseph · New York, American Book Co · leaf 33
projec-tion of the terminal point of the segment. Thus MN is theprojection of PQ upon AB, and NM is the projection of QPupon AB. J^rom the definition, M]Sr PH -;r:r = -zzt:: = COS a, PQ PQ ^ .: MN= PQ ■ cos a; i.e., the projection of a segment of a line upon another line is equalto the product of… … L B Fio. 76. 13] ALGEBRAIC AND TRIGONOMETRIC CONCEPTIONS 17 and the projection, of a broken line * upon any line is the alge-braic sum of the projections of its parts upon the same line.Thus the projection of PQRST upon AB is the projection ofPQ+ the projection of QR + •••, upon AB; i.e., proj.…
Geometry, Analytic
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