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

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182170 cus datus ſit _Q_uadrante maior, ſed ſemicirculo minor; detracto _Q_uadrante, inqui-
11modo eli-
ciat̃
per par
tẽ
propor-
tionalem
.
res reſidui arcus ſinum rectum per eandem regulam proportionum, eo modo, quem
ſupra
de ſinu recto tradidimus.
_Q_uamuis _S_ecunda negligi poſsint, vt ſupra docui-
mus
, in hoc ſinuum negotio _E_xemplum.
_S_it datus arcus grad. _69_. _M_in. _16._ _S_ec. _40._
_A_ccipedifferentiam _2721_. inter ſinum _3540190._ arcus grad. _69_. _M_in. _16_. proxime
minoris
in parte tabulæ inferiori deſcripti, &
ſinum _3537469_. arcus grad. _69_. _M_in.
_17
._
proxime maioris in eadem parteinferiori tabulæ poſiti; & dic. _S_i _40._ _S_ecundæ
requirunt
differentiam _2721_.
ſubtrahendam à ſinu _3540190_. arcus grad. _69_. _M_in.
_16
._
in i feriori parte tabulæ poſiti, vt relinquatur ſinus _3537469_. arcus grad. _69_.
_M_in
.
_17_. in eadem parte inferiori tabulæ deſcripti: quantam differentiam poſtulãt
_40_
.
_S_ecunda ſubtrahendam ab eodem ſinu _3540190_. arcus grad _69_. _M_in. _16_. poſiti
in
part in feriori tabulæ, vt relinquatur ſinus arcus grad.
_69_. _M_in. _16._ _S_ec. _40_ in
eadẽ
parte inferiori tabulæ contenti?
Inuenies enim differentiã ſiue partẽ proportio-
nalẽ
_1814_.
quæ ſubtracta ex sinu _3540190_. relinquet sinum _3538376_. arcus grad.
_69_
.
_M_in. _16_. _S_ec. _40_. in inferiori parte tabulæ collocati: qui quidem eſt sinus rectus
arcus
grad.
_20_ _M_in. _43_ _S_ec. _20_. hoc eſt, complementi arcus datigrad. _69._ _M_in. _16_.
_S_ec
.
_40_. _S_it rurſum datus arcus grad. _110_. _M_in. _43_. _S_ec. _20_. _D_etrahe _Q_uadrantem,
id
eſt, grad.
_90_ & residui arcus grad. _20_. _M_in. _43_. _S_ec. _20_. quære sinum rectum, vt
ſupra
tradidimus.
_I_nuenies enim per partem proportionalem, sinum _3538376_. qui
eſt
sinus complementi arcus propositi.
_HOC_ etiam modo sinum complemẽti arcus propositi quadrante minoris reperies.
22@lia in.
ueſtigãdi
ſi
comple
menti
arcꝰ
quad
rante
minoris
.
_S_ubtrahe propositũ arcum ex quadrante, vt habeas eius complementum _S_inus enim
rectus
eius complementi inuentus, vt de sinu recto diximus, eſt is, qui quæritur.
_V_t
si
quæratur sinus complementi arcus grad.
_69_. _M_in. _16_. _S_ec. _40_. detrahe hunc ar-
cum
ex grad.
_90_. & residui arcus grad. _20_. _M_in. _43_. ſec. _20_. (qui complementum
eſt
dati arcus grad.
_69_. _M_in. _16_. _S_ec. _40_) sinum rectum quære, quem inuenies eſſe
_3538376_
.
atque hic eſt sinus complementi dati arcus grad. _69_. _M_in. _16_. _S_ec. _40_.
33Sinꝰ cõple
mẽti
ſemi-
circuli
, aut
arcus
maio
ris
, q̃rendus
non
eſt.
_QVANDO_ deniq; propositi arcus sinum verſum desideras; si quidem _Q_uadrante
minor
eſt, detrahe eius sinum complementi ex sinu toto:
si vero _Q_uadrante eſt ma-
ior
, ſed ſemicirculo minor, adde eius sinum complementi sinui toti.
_N_umerus enim
reliquus
, vel compositus, erit sinus verſus dati arcus:
propterea quod sinus comple-
44Sinꝰ verſus
cuiuſuis
ar
cꝰ
ſiue qua
d@ãte
mino
ris
ſiue ma
ioris
, quo
pacto
colli
gatur
.
menti cuiusuis arcus æqualis est complemento sinus versi eiuſdem arcus, vt ſupra
in
definitionibus oſtendimus.
Ex quo fit, vt sinus complementi arcus cuiusuis abla-
tus
ex sinu toto, vel ad eum adiectus relinquat, vel componat eiuſdem arcus sinum
verſum
:
_I_d quod perſpicuum eſt ex prima figura, quam in expositione definitionum
poſuimus
.
_E_xemplum. _S_it quærendus sinus verſus arcus grad. _20_. _M_in. _57_. _H_uius
sinuscomplementi
eſt _9338928_ qui detractus ex sinu toto _10000000_.
relinquet
sinum
verſum _661072_.
dati arcus grad. _20_. _M_in. _57_. _R_urſus sit inueſtigandus sinus
verſus
arcus grad.
_138_. _M_in. _31_. _H_uius sinus complementi eſt _7491484_. qui additus
sinui
toti _10000000_.
efficiet sinum verſum _17491484_. arcus propositi grad. _138_.
_M_in. _31_. _P_oſtremo sit inueniendus sinus verſus arcus grad. _69_. _M_in. _16_. _S_ec. _40_.
_H_uius
complementi sinus eſt _3538376_.
inuentus per partem proportionalem; qui
ſubtractus
ex ſinu toto _10000000_.
relinquet ſinũ verſum _6461624_. dati arcus grad.
_69_
_M_in.
_16_. _S_ec. _40_. _S_ic quoque ſinus verſus arcus grad. _159_. _M_in. _16_. _S_ec. _40_. reperie-
tur
_13538376_.
per partem proportionalem.

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