The theory and practice of surveying. Designed for the use of surveyors and engineers generally, but especially for the use of students in engineering (1886)
Johnson, J. B. (John Butler), 1850-1902 · New York, J. Wiley & sons · leaf 311
he Boat to three points onshore whose relative positions are known. This is called thethree-point problem. Let A, C, and B be the three shorepoints, being defined by the two distances a and b and the angle 28o SURVEYING. C. Let the two angles P and P be measured at the point P.The problem is to… … Also, X sin P sin P + ^ = 36o°-(P+P+0 = i?. . . ..(2) From (2), y = R — Xy and sin ;j/ = sin i? cos x — cos i? sin x. Substitute this value of sin^ in (i), reduce, and find cot X a sin F -\-b sin P cos Rb sin P sin R „ / ^ sin P , \ = cot A I ■ -p ^+1). . \b sm /^ cos K I . . (3) When X and jj/ are…
Surveying
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
