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 74
388,6 on the line ofnumbers. RIGHT-ANGLED TRIGONOMETRY. *7 CASES IV. and V.The hypotetmfe and one leg given, to find the angles and other leg.The leg- AB 91, the hypotenufe AC 170, given, to find the angle ACB, tx BAC/and the leg BC. By PROJECTION. Draw BC at pleafure; on B erectthe perpendicular B… … By LOGARITHMS. By making the hypotenufe radius, it will be, To find the bafe BC*As radius, 10.00000 Is to the hypotenufe 170 2.23045So is fine ang. A 570 38 9.92667 To find the angle C.As the hypotenufe 170 2.23045 Is to the radius 10.00000 So is the perpendicular 91 1.95904 To fine angle C 320 22…
Navigation · Nautical astronomy
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