Theodosius <Bithynius>; Clavius, Christoph, Theodosii Tripolitae Sphaericorum libri tres

Table of contents

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[81.] THEOR. 8. PROP. 8.
[82.] SCHOLIVM.
[83.] THEOR. 9. PROPOS. 9.
[84.] SCHOLIVM.
[86.] THEOR, 10. PROP. 10.
[87.] THEOR. 11. PROP. 11
[88.] THEOR. 12. PROPOS. 12.
[89.] THEOREMA 13. PROPOS. 13.
[90.] PROBL. 1. PROP. 14.
[91.] PROBL. 2. PROPOS. 15.
[92.] SCHOLIVM.
[93.] THEOR. 14. PROPOS. 16.
[94.] SCHOLIVM.
[95.] THEOREMA 15. PROPOS. 17.
[96.] THEOR 16. PROPOS. 18.
[97.] THEOR. 17. PROPOS. 19.
[98.] THEOREMA 18. PROPOS. 20.
[99.] COROLLARIVM.
[100.] THEOREMA 19. PROPOS. 21.
[101.] SCHOLIVM.
[102.] I.
[103.] II.
[104.] III.
[105.] IIII.
[106.] V.
[107.] THEOREMA 20. PROPOS. 22.
[108.] THEOR. 21. PROPOS. 23.
[109.] FINIS LIBRI I I. THEODOSII.
[110.] THEODOSII SPHAERICORVM LIBER TERTIVS.
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13512311
24 # 45 # 4186597 # 56 # 15 # 8314696 # 87 # 45 # 9992290 # 75 # 0 # 965925
27 # 0 # 4539905 # 58 # 30 # 8526402 # 3 # 45 # 654031 # 82 # 30 # 9914449
9 # 15 # 4886212 # 60 # 45 # 8724960 # 7 # 30 # 1305262 # 86 # 15 # 9978589
31 # 30 # 5224986 # 63 # 0 # 8910065 # 15 # 0 # 2588190 # 90 # 0 # 10000000
ſtum eſt, ſinum grad.
54. hoc eſt. 8090170. componi præciſe ex ſinubus grad. 18.
& 30. hoc eſt, ex 3090170. & 5000000. Et quia ſinus grad. 30. æqualis eſt ſemiſ-
ſi ſinus totius, vt ſupra oſtenſum eſt, liquet ſinum grad.
54. componi ad vngué
ex ſemiſſe ſinus totius, &
ſinu recto grad. 18. Id quod propoſ. 6. à nobis eſt de-
monſtratum.
IAM vero ſinum arcus grad. 12. beneſicio ſinuum grad. 30. & 54. qui iam
22Supputatio
ſinus arcus
grad. 12.
noti facti ſunt, ita inueſtigabimus.
Sit in quadrā
131[Figure 131] te ABC, arcus BD, grad.
30. & BE, grad. 54. at-
que adeò arcus DE, eorum differentia, grad.
24.
ducanturque rectæ DF, EG, ad AB, perpendi-
culares, quæ ſinus recti erunt arcuum BD, BE;

Item rectæ DH, EI, ad AC, perpendiculares,
quæ finus recti erunt arcuum CD, CE, grad.

60.
& 36. qui complementa ſunt arcuum BD,
BE.
Secet autem recta DH, rectam EG, in K.
Et quoniam ſinus DF, hoc eſt, KG, illi æqua-
3334. primi. lis, &
EG, noti ſunt; erit quoque eorum diffe-
rentia EK, nota.
Similiter quia ſinus EI, hoc
eſt, KH, illi æqualis, &
DH, noti quoque ſunt, per propof. 3. cum ſint ſinus
4434. primi. complementorum arcuum BE, BD;
erit etiam eorum differentia DK, nota;
ac proinde duo quadrata rectarum notarum Ek, DK, nota erunt: quæ cum
æqualia ſint quadrato rectæ DE, notum quoque erit quadratum rectæ DE,
5547. primi proptereaque &
ipſarecta DE, nota erit, nem pe chorda arcus grad. 24. Hinc
&
eius medietas nota erit, nimirum ſinus rectus arcus grad. 12. continebitque
66Ex duorũ
arcuũ ſinu
bus notis
notus quo-
que ſit ſinꝰ
medietatis
differentiæ
arcuum.
particulas 2079117.
Hac eadem arte; ſi duorum arcuum quorumcumque ſinus
cogniti ſint, cognoſcetur etiam ſinus medietatis differentiæ illorum arcuum.
Vt ſi ſinus arcuum BD, BE, quorumcumque etiam ſi non contineant grad. 30.
&
54. noti ſint, erunt & ſinus complementorum CD, CE, per propof. 3. noti.
Quare, vt modo demon ſtrauimus, nota ſiet chorda DE;
ac proinde eius me-
dietas nota quoque erit, nempe ſinus medietatis arcus DE.
CaeTervm ex ſinu arcus grad. 12. (ſi hunc arcum bifariam ſecemus
77Supputatio
ſinuu ar-
cuum Mi-
nutis 45. ſe
ſe ſupeian-
tium.
continue, quoad poſſumus, medietatumq́;
complementa accipiamus, vnà cum
ſinu complementi arcus grad.
12. quæ rurſus ſecemus bifariam continue, & c.)
reperiemus per coroll. propof. 4. & per propoſ. 3. ſinus omnium hor um arcuũ,
qui in hac tabella continentur.
Quos ſinus ſi cum ſinubus proxime antece-
dentis tabellæ in ordinem redigamus, habebimus ſinus arcuum numero 120.

88
## Arcus # Sinus # ## Arcus # Sinus # ## Arcus # Sinus # ## Arcus # Sinus
G # M # # G # M # # G # M # # G # M
12 # 0 # 2079117 # 42 # 0 # 6691306 # 12 # 45 # 2206974 # 33 # 0 # 5446390
78 # 0 # 9781476 # 48 # 0 # 7431448 # 77 # 15 # 9753423 # 57 # 0 # 8386706

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