The elements of navigation : containing the theory and practice, with all the necessary tables, to which is added, a treatise of marine fortification ... (1754)
Robertson, J. (John), 1712-1776, Adams, Charles Francis, 1807-1886, former owner. BRL, Adams, John, 1735-1826, former owner. BRL, Boston Public Library) John Adams Library BRL · London : Printed for J. Nourse ... · leaf 174
cab : cot. (Z.acd, call it) m. (3d. 497) jOr Rad : cof. giv. fide :: tan. L. opp. fide fought : cot. (of a fourth -zz.)m> |Like the angle opp. fide fought, if the given fide is acute.But unlike that angle, if the given fide ie obtufe. Take tbediff. between L. (acb) adj. fide-fought, and (Z_acd=)… … and : Cof. Z.CAB.Cof. Z.ABC. (ift.499) : cot. cb : cot. ac.: : tan. ac : tan. cb. Or cof. n : cof. m : : tan. given fide : tan. fide required. Like n, if the angle eppofte the ftde fought be acute. But unlike n if the angle is tbtufe. ad. To find the other angle abc As Rad : cof. ac : : tan. /.cab…
Navigation · Nautical astronomy · Fortification
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