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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 72

An illustration from The new American practical navigator : being an epitome of navigation, containing all the tables necessary ..., 1802, leaf 72
in right-angled trigonometry* CASE h The angles and hypotenufe given, to J:fid the legs. Given the hypotenufe AC 250 leagues, and the angle C oppofite to thefide ABri35& 30, to find the bafe CB and perpendicular AB*. By PROJECTION, Draw the bafe CB ofany length ; on Cas a centre, defcribe the… … By LOGARITHMS. By making the hypotenufe CA radius, it will be, To find the bafe BC;As radius 10.00000 Is to the hypot. AC 256 2.39794So is fine ang. A 540 3© 9.91069 To find the perpendicular AB,As radius 16.00000 Is to the hypot. AC 256 2.39794So is fine ang. C 35s 30 9*76395 To the bafe BC 203,5…

Navigation · Nautical astronomy

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