Theodosius <Bithynius>; Clavius, Christoph
,
Theodosii Tripolitae Sphaericorum libri tres
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<
s
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xml:space
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">ALITER ſine tangentibus per ſolos ſinus. </
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<
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xml:id
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xml:space
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">Iisdem poſitis, quoniam, per
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xlink:label
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note-329-01
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xml:space
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">Aliter ſine
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tãgẽtibus.</
note
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ea, quæ in ſinuum deſin. </
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<
s
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echoid-s9968
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xml:space
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">oſtendimus, poſito ſinu toto ED, recta HD, ſinus
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eſt anguli HED, nimirum ſ@miſsis differentiæ arcuum, vel angulorum datæ,
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hoc eſt, grad. </
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<
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<
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">& </
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<
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xml:space
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">HE, ſinus anguli HDE, grad. </
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<
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<
s
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xml:space
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">vt pote complementi
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anguli HED; </
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<
s
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">dabitur ex ſinuum tabula, HD, partium 50000. </
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<
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xml:space
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">& </
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<
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tium 86603. </
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<
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<
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">Si HD, ſemiſsis differentiæ terminorum
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proportionis datæ, nimirum 3. </
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<
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">dat HD, ſinum @0000. </
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<
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differentiæ arcuũ, angulorum ve datæ, quid dabit HG, aggregatũ ex ſemiſſe
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differentiæ terminorum proportionis, & </
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<
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nempe 8? </
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<
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">inueniemus HG, eſſe 133333. </
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<
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HD. # HD. # HG. # # HG.
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3. # 50000. # 8? # ſit. # 133333.
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">Igitur, cum quadrata rectarum EH, HG, nempe 7499906404. </
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">17777688889.
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<
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">æqualia ſint quadrato rectæ EG, fiet quadratum rectæ EG, 25277595293. </
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">47.primi.</
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cuius radix quadrata indicabit rectam EG, eſſe 158989. </
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<
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xml:space
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ED. </
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<
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xml:space
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">Cum autem, vt in noſtris ſinubus diximus, poſito ſinutoto EG, recta
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HG, ſit ſinus anguli HEG; </
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<
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">dicemus rurſum. </
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<
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">Si EG, inuenta partiũ 158989.
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</
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<
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">dat EG, ſinum totum partium 100000. </
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<
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">quid dabit HG, inuenta partium
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133333? </
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<
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">reperiemusq́; </
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<
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">HG, ſinum anguli HEG, partiũ 83863. </
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<
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EG. # EG. # HG. # # HG.
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158989. # 100000. # 133333? # ſit. # 83863.
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<
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">Hic ſinus in tabula ſinuum monſtratarcum grad. </
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AEF, ſiue arcus AF; </
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<
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">cui ſi adijciatur ſemiſsis AB, grad. </
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BF, & </
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">angulus BEF, grad. </
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grad. </
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<
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<
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<
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fiat, vt ſemiſſis differentiæ terminorum proportionis datæ ad ſinum ſemiſ-
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ſis differentiæ arcuum, vel angulorum datæ, ita aggregatum ex ſemiſſe
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differentiæ terminorum proportionis, & </
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<
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nis, ad aliud, inuenietur numerus; </
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<
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to ſinus compl@menti ſemiſſis differentiæ arcuum, vel angulorum datæ: </
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<
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tandem fiat, vt compoſiti buius numeriradix quadrata ad ſinum totum,
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itanumerus per regulam auream nuper inuentus ad aliud, inuenietur ſi-
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nus anguli, ſiue arcus, cui ſi addatur ſemiſſis differentiæ arcuum, vel an-
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gulorum datæ, notus fict maior arcus, ſiue angulus: </
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<
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eadem ſemiſſis detrahatur, remanebit minor arcus, angulusve cognitus.
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</
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<
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</
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<
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<
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extenſa recta BE, vſq; </
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<
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BF, DF, datur grad. </
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<
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<
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">dabitur reliquus ſemicirculiarcus DI, nimirum ag-
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gregatum arcuum DF, FI, grad. </
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<
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<
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<
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BF, hoc eſt, arcus FI, (cum arcus BF, FI, eundem ſinum habeant, vt in de-
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fin. </
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<
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<
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monſtratum eſt, vterq; </
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<
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">arcus IF, DF, cognoſcetur, quorum DF, eſt minor
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<
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propoſitorum arcuum: </
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<
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">at FI, complementum maioris BF, vſq; </
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