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Trigonometria (1657)

Oughtred · leaf 24

An illustration from Trigonometria, 1657, leaf 24
-s coj2. Sinus vcrfus arcus A ED,cftG A =C A --DR*Et finus vcrfus arcus conjun&icceJ* cftCct+DR. … C G-- HA VIII. UtTangcns arcus,eft ad Radium, Sic Radius, eftad tangentem complement. t arc . Rad. :: Rad. . t co arc. Nam,AH .CA :: CB. BL. IX. Ut finus aicus, eft ad Radium 5 fie Radius, eft adSecantcm complement!. B % varc C43 s arc . Rad :: Rad . se co arc; Nam,EM . EC :iCB * GLAtquc ha?c eft…

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