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 75
e 59, and the bafe ^ miles, given, to find theperpendicular. Anf. Perpendicular 48.9 miles. Queft. 6. The bafe ^^, and perpendicular 52 leagues, given, to find,{he hypotenufe. Anf. Hypotenufe 61.59 leagues. OBLI QU E TRIGONOMETRY. CASE I.TU.Q angles and cjis fide given3 ip find either of tin legs.… … OBLIQUE TRIGONOMETRY^ «9 By PROJECTION.Subtraft the fum of the angles A and C from 18o°, the remainder will bethe an^le B= 260. Draw the indefinite line GE ; and from any point of itas B, draw the line BH making the angle EBH=z6% on BH fct off BA220. On A make the angle BAC ioo° ; then AC will…
Navigation · Nautical astronomy
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