The new American practical navigator : being an epitome of navigation, containing all the tables necessary ... (1802)
Bowditch, Nathaniel, 1773-1838, Lee, Marvin, former owner. DSI, Stuart, Gilbert, 1755-1828 DSI, Burndy Library, donor. DSI · [Salem] : Printed at Newburyport, Mass., 1802, by Edmund M. Blunt, for Cushing and Appleton, Salem : Sold by every book-seller, ship- chandler, and mathematical-instrument-maker in the United States and West Indies · leaf 73
. and III. The angles a?id one leg given, to find the hypotenufe and other leg. The angle ACB 330 15, the leg BC 325 miles, given, to find the hj,potenufe and the other leg. By PROJECTION. Draw the line BC, which makeequal to 325 miles ; on B erect, theperpendicular BA ; on C, as a cen-tre, with… … By LOGARITHMS.By making the bafe BC radius, it will be, To find the perpendicular AB.As radius 450 10.00000 Is to the bafe BC 325 2.51188 So is tang. ang. C 33° 15 9.81666 To the perpen. AB 213,1 2.32854 To find the hypotenufe AC.As radius 900 10.00000 Is to the bafe BC 325 2.51188 So is fee. ang.…
Navigation · Nautical astronomy
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