Elements of geometry and trigonometry. Revised and adapted to the course of mathematical instruction in the United States (1856)
Legendre, A. M. (Adrien Marie), 1752-1833, Davies, Charles, 1798-1876 · New York : A.S. Barnes · leaf 293
he river a hori-zontal base line AB, and select thestations A and B, in such a man-ner that each can be seen from theother, and the point C from bothof them. Then measure the hori-zontal angles CAB and CBA withan instrument adapted to that purpose. Let us suppose that we have found AB = 600… … PLANE TRIGONOMETRY. 289 To find tlie distance A C. sin 0 57° 34 ar. comp. 0.073649 sin i? 6-i 51 9.95674^1 AB 600 2.778151 ,? AG 643.94 yards 2.808544. 11. To determine tJie altitude of an inaccessihle object above agiven liorizontal plane, FIRST METHOD. Z^. Suppose D to be tlie inac- D cessible…
Geometry · Trigonometry
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