TRIGONOMETRIA BRITANNIC A* The Firft Book. CHAP. I. … Of the quantityofright lines, as they arerelatingtoa Circle. * IRIGONOMETRY is a Do£trine, which fheweth bythe Rule of Three, and the Proportions which the parts ofa Triangle have, one to another,three things in any Trianglebeing given, whether fides or angles, or both, how the otherfides or angles…
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