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Trigonometria (1657)

Oughtred · leaf 42

An illustration from Trigonometria, 1657, leaf 42
. *CA. 11. Sinus bafium, tangcntibus cathecorum font dire&epr©^portionalcs. R. sBA :: *B. tCA.quereR. f **B :;JCA. $BAr. Nam(juxta ca qusead fchema A tra-ditafunt) cogitctur BPE Quadrans pAnalcmmatis$ in quo defcribuntur tri-angula fphcrica, B F E majus, & BC Aminus: una cum arcuum finibus… … If X^Bp [>]

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