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 124
Z.c=22° 37To ab—159F.So s,z.a=58° 04 To 20=350,9 0,41503 2,201409,92874 2,545x7 Leaves Z. a r: 58 04354. Example VII. In the plane Triangleabc,G™=^FUrlo„g, Z.B=:900 OO.Required the rejl* Construction. Make the angle aec=90°; take BAr=i95 equal parts, and BC=2i6;and draw ac; then abc is the triangle… … To find the angle a. As ABZZI95 F. To Radius—450 ooSo bc—216 F. To t,ZA-47°5590 00 7,70996 10,00000 2.3344510,04441 To find ac.Ass,Z-a—470 55To bc—216F.So s,Z.b—900 oo To ac;=29I F. 0,12950 2.3344510,00000 2546395 Z»c=42 05 355- v. 104 TRIGONOMETRY. 355* Example VIII. In the plane triangle abc. C…
Navigation · Nautical astronomy · Fortification
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