Theodosius <Bithynius>; Clavius, Christoph
,
Theodosii Tripolitae Sphaericorum libri tres
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<
1 - 30
31 - 60
61 - 90
91 - 120
121 - 150
151 - 180
181 - 210
211 - 240
241 - 270
271 - 300
301 - 330
331 - 360
361 - 372
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lorum ſubducatur, reliquus erit arcus, vel angulus minor.</
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<
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xml:space
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">SI vero proportio ſinus maioris arcus, vel anguli, ad ſinum minoris eſt
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minoris inæqualitatis; </
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<
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xml:space
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">inuertantur eius termini, vt fiat proportio maioris in-
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æqualitatis; </
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<
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xml:space
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">atque ex hac, & </
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<
s
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xml:space
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">data differentia arcuum, ſeu angulorum inue-
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niantur duo arcus, vel anguli, vt dictum eſt. </
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<
s
xml:id
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xml:space
="
preserve
">Nam maior eotum ex ſemicircu-
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lo ſublatus dabit minorem arcum, ſeu angulum quæſitum; </
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<
s
xml:id
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xml:space
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">minor vero ſubdu-
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ctus ex ſemicirculo offeret maiorem.</
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<
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</
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<
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<
s
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xml:space
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">QVANDO ſinus maioris arcus, vel anguli ad ſinũ minoris habet pro-
<
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<
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xml:space
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">Propoſ. 7.
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triang re-
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ctil.</
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portionem maioris inæqualitatis; </
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<
s
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xml:space
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">inquirantur ex data illa proportione maio-
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ris inæqualitatis, & </
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<
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xml:space
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">ex arcu, ſeu angulo, qui poſt detractionem datæ differen-
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tiæ ex ſemicirculo relinquitur, tanquam ex aggregato duorum arcuum, ſiue
<
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angulorum, duo arcus, ſiue anguli huius aggregati, vt in problemate 6. </
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<
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cepimus. </
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<
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xml:space
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">Nam maior arcus, ſeu angulus inuentus, ſi ex ſemicirculo aufera-
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tur, dabit maiorem arcum ſiue angulum quæſitum: </
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<
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xml:space
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">Minor autem inuentus
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erit minor quæſitus.</
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<
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</
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<
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<
s
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xml:space
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">QVANDO autem proportio data eſt minoris inæqualitatis; </
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<
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">inuertan-
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tur eius termini, vt fiat proportio maioris inæqualitatis: </
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<
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">atque ex hac, & </
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<
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">da-
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ta differentia arcuum, ſeu angulorum, inueſtigentur duo arcus, ſiue anguli,
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vt iam dictum eſt. </
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<
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xml:space
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">Maior enim eorum ex ſemicirculo ſubtractus dabit arcum,
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ſeu angulum quæſitum minorem; </
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<
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xml:space
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">Minor vero maiorem.</
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</
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<
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xml:space
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">Aliter per ſolos ſinus.</
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<
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="
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<
s
xml:id
="
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xml:space
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">SI data proportio ſinus maioris arcus, ſiue anguli ad ſinum minoris eſt maioris in-
<
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<
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position
="
right
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xlink:label
="
note-501-02
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xlink:href
="
note-501-02a
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xml:space
="
preserve
">Propoſ. 7.
<
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trtrang. re-
<
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ctil.</
note
>
æqualitatis; </
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<
s
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="
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xml:space
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">fiat, vt ſemiſsis differentiæ terminorum proportionis datæ ad ſinum ſe-
<
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miſsis datæ differentiæ arcuum, vel angulorum, ita aggregatum ex ſemiſſe differen
<
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tiæ terminorum proportionis, & </
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<
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">conſequẽte termino eiuſdem proportionis, ad aliud,
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inuenieturq́; </
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<
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">quartus quidam numerus; </
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<
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xml:space
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">cuius quadratum ſi adijciatur quadrato ſi-
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nus complementi ſemiſsis differentiæ arcuum, ſeu angulorum datæ: </
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<
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vt radix quadrata aggregati dictorum duorum quadratorum ad ſinum totum, ita
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numerus ille quartus inuentus ad aliud, reperietur ſinus arcus, ſiue anguli, cui ſi
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addatur ſemißis datæ differentiæ arcuum, ſeu angulorum, notus fiet maior arcus, ſi-
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ue angulus: </
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<
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">ab eodem vero ſi eadem ſemiſsis detrahatur, reliquus erit minor.</
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</
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<
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">QVOD ſi data proportio ſit minoris inæqualitatis, agẽdũ erit, vt ſupra diximus.</
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<
s
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xml:space
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">IAM vero ſi forte proportio data ſit æqualitatis, detrahatur differentia
<
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data arcuum, ſiue angulorum ex ſemicirculo. </
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<
s
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xml:space
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">Nam reſidui ſemiſsis erit minor
<
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arcus, ſeu angulus quæſitus: </
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<
s
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xml:space
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">eadem vero ſemiſsis ad datam differentiam adie-
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cta dabit maiorem.</
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<
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<
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caſus lineæ
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perpẽdicu-
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laris.</
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<
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">9. SI ab vno angulo trianguli cuiuſvis dato-
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rum laterum ad latus oppoſitum perpendicu
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laris demittatur, quãta ſit recta inter perpen-
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dicularem, & vtrum vis reliquorum angulo-
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rum, inuenire.</
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