[Coffin, John Huntington Crane], 1815-1890. [from old catalog] · New York, D. Van Nostrand · leaf 49
ects the equator, andthen by the right trianglesE C c\ E C c, E & c\&c, the latitudes and lon-gitudes of C, 0, C, &c.Let XL = E a, the longitude of A from E ;A2 = E 5, the longitude of B from E ;A = X2 — Xx = a&, the difference of longitude of B from A;Li and Z2, respectively the… … Fig. 10. or tan E =tan Lv = sin E atan Lx * sin E Vtan Z.> sin I, sin 7 * GREAT-CIRCLE SAILING. 43 whence sin ?itsin /t2 tan Lx tan L2 ?and by composition and division, sin ^ + sin \ tan L2 + tan Zx sin X2 — sin ax tan L2 — tan Zx* By PL Trig., (109) and (126), this becomes tan £ (%2 + /Ij) sin…
Navigation · Nautical astronomy
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