dem arcus , dicitur 5inus redus . Pars diametri intercepta inter ex- tremum datiarcus , &fioum redumeft finus verfus , Sinus arcus , qui requiritur ad complendum quadrantem dicitur finus complementi, vt arcusilleeft arcuscomple- Bienti . H^c facilius perlpicientur in figura , qu* prarterea oftendet… … 8 Pfoletneus in Almagefto finum totum conftituit partium 60. Arzael Arabs partium lyo Icd nefradionibus, & minutis minutorum res euaderct difficilior Georgius Purbar-hius, loannes Regiomontanus, Petrus Appianus, i i ^tcrea Clauius,Grambcr genus.
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![An illustration from Ioan Henrici Alstedii Scientiarum omnium encyclopædiæ : tomus primus [-quartus] ... (1649)](https://img.insideoutlibrary.com/img/200/ia-ioanhenricialste01alst-951-220.webp)
![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-145-81.webp)
![An illustration from Ioan Henrici Alstedii Scientiarum omnium encyclopædiæ : tomus primus [-quartus] ... (1649)](https://img.insideoutlibrary.com/img/200/ia-ioanhenricialste01alst-953-231.webp)