Schmall, Charles Nelson. [from old catalog] · New York, D. Van Nostrand company · leaf 40
Take AD : FD in given ratio of the tangents.And AD : ED in given ratio of the sines. On AF as diameter describe a semicircle, and with D as center, DEas radius, describe another. Through their point of intersection H, draw AHR.DAR = yp, and DHR = \j/ are the required angles.Draw DQ±HR, and RN II…
Geometry, Analytic
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