A system of geometry and trigonometry : with a treatise on surveying ... in which, also, the principles of rectangular surveying ... are fully explained: with a complete series of mathematical tables, and the necessary explanations (1830)
Flint, Abel, 1765-1825, Gillet, George, Barnard, Frederick A. P. (Frederick Augustus Porter), 1809-1889 · Hartford : Cooke & co. · leaf 34
UARES OF THU TWO LEGS. Hence, The square of the given leg being subtracted from TRIGONOMETRY. 31 THE SQUARE OF THE HYPOTHENUSE, THE REMAINDER WILLBE THE SQUARE OF THE REQUIRED LEG* As in the preceding example ; the square of the leg AB40 is 1600 ; this subtracted from the square of the hypothe-nuse… … 7^,r In the triangle ABC, given the leg AB 78.7 and the legBC 89 ; to find the angles and hypothenuse. Making the leg AB radius, the proportion to find the angleBAC will be ; Asleg AB, 78.7 1.895975 : radius - - 10.000000 : : leg BC, 89 - 1.949390 11.949390 1.895975 tang. BAC, 48° 31 10.053415 The…
Surveying
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