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An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth (1888)

Gwilt, Joseph, 1784-1863, Papworth, Wyatt Angelicus Van Sandau, 1822-1894 · London Longmans, Green · leaf 318

An illustration from An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth, 1888, leaf 318
formed by onlyaddition and subtraction. Iables of this sort are pub-lished separately, and we su])posj the reader to be pro-vided witi them. 1048. Problem I. To compute the 7iatural sine and cosineof a given arc. The semiperiphery of a circle whose radius is ] isknown to be 3-141592653589793,… … Fig. 396. Now the length of the arc baing denated by the letter n. and its sine and cosine by s and c,these two will be expressed by the two following series, viz. —

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