Theodosius <Bithynius>; Clavius, Christoph
,
Theodosii Tripolitae Sphaericorum libri tres
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hoc eſt, terminorum proportionis ſinuum angulorum reliquorum, & </
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terum laterum, ſiue terminorum proportionis, ad aliud, reperietur tan-
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gens anguli, qui cum ſemiſſe ſummæ reliquorum angulorum componet ma-
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iorem angulum, qui nimirum maiori lateri dato opponitur: </
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<
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eadem ſemiſſe dictæ ſummæ detractus relinquet angulum minorem mino-
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ri lateri dato oppoſitum; </
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<
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anguli in principio dati, ita latus inuento angulo, qui acceptus fuerit in
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regula aurea, oppoſitum ad aliud, inuenietur tertium latus. </
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<
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rem perſpicuit atem proponemus aliud exemplam.</
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<
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<
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<
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http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/YC97H42F/figures/341-01
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angulo A, grad. </
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grad. </
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<
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</
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<
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AB, AC, id eſt, terminorum proportionis ſinuum
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angulorum B, C, ad 476595. </
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mæ angulorum B, C, hoc eſt, ad tangentem grad. </
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Min. </
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<
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terũ AB, AC, vel terminorũ laterum, ſeu terminorum,
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ad aliud, reperietur tangens 80931. </
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<
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<
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grad. </
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<
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<
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<
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gulum maiorem B, maiori lateri dato AC, oppoſitum grad. </
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vero arcus grad. </
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<
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<
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eſt, ex grad. </
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<
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<
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teri dato AB, oppoſitum grad. </
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hic vides.</
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26 {1/2}. # 476595. # 4 {1/2}? # fit # 80931.
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<
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tus AB, 22. </
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<
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A, ita latus AC, 31. </
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C. # A. # # AB. # # BC.
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63158. # 40195. # # 22? # ſit # 14 ferè
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# # Vel
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B. # A. # # AC. # # BC.
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88995. # 40195. # # 31? # fit # 14. ferè.
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<
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<
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uentione angulorum B, C.</
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<
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terum pro-
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portio data
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eſt.</
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comprehenſo, aſcribemus dictis lateribus numeros proportionis, ac ſi in ipſis
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data eſſent, problemaq́ abſoluemus, vt prius.</
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<
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</
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ſtratio pro-
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blematis ſi-
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ne ppoſ.6.</
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In triangulo ABC, detur latus AB, 29. </
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">& </
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<
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grad. </
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pendicularis CD: </
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<
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<
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