Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 245
formerto 27, and of the latter to A.Turn each toward the curvethe same number of degrees,and mark P, the point ofintersection of the lines ofsight. P will be a point in the circle to which AD andAE are tangents at D and E, respectively. 72 SURVEYING. Fourth Method. Measure the angle A and the… … Fig. 56. I and measure DP=l\ make the angle ADP = 2 ADPmake the angle ADP = S ADP and PP 2r and PP = l; = I; etc. P} P1, P, etc., will be in the circumference of the required arc. ANSWEES. PLANE TRIGONOMETRY. Exercise I. 1. sinJS = -, cosB = -, tan£ = _, cotB = ^t secB = ~, cscB =c c aba 3. (i.)…
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