Cyclomathesis : or, An easy introduction to the several branches of the mathematics; being principally designed for the instruction of young students, before they enter upon the more abtruse and difficult parts thereof (1763)
Emerson, William, 1701-1782, Adams, Charles Francis, 1807-1886, former owner. BRL, Adams, John Quincy, 1767-1848, former owner. BRL, Boston Public Library) John Adams Library BRL · London : Printed for J. Nourse ... · leaf 468
I. 44. cor.) As rad ; j tans:. PV : :tang. GC + tang. MD : cof. GPV or MPV. P R O B. CLII. 04. In the fpherkal triangle ABC, we have given the an-gles ADC, CDB, BDA, about the point D ; andthe triangle ABC itfelf\ to find the diftances AO,BO, CO. Let j, c be the fine and cofine of A ; p% qzzfineand… … Pl.W/^fyL Sed. VIII. PROBLEMS. 443 P R O B. CLIII. FJg- Given the difference of the azimuths of three knownJlars -, to find their altitudes. Let Z be the zenith; A, B, C, the ftars. Since gr.their places are given, the triangle ABC will be gi-ven. Put j, c zz fine and cof. 4-ABC, a zz S/AB;£--S.3C,…
Mathematics
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