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

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[141.] CHRISTOPHORI CLAV II BAMBERGENSIS E SOCIETATE IESV SINVS, VEL SEMISSES RECTARVM in circulo ſubtenſarum: LINEÆ TANGENTES, ATQVE SECANTES. PRÆFATIO.
[142.] DEFINITIONES. I.
[143.] II.
[144.] III.
[145.] Vel aliter.
[146.] IIII.
[148.] VI.
[149.] VII.
[150.] LEMMA.
[151.] THEOR. 1. PROPOS. 1.
[152.] COROLLARIVM.
[153.] PROBL. 1. PROPOS. 2.
[154.] PROBL. 2. PROPOS. 3.
[155.] COROLLARIVM.
[156.] THEOR. 2. PROPOS. 4.
[157.] COROLLARIVM.
[158.] SCHOLIVM.
[159.] THEOR 3. PROPOS. 5.
[160.] COROLLARIVM.
[161.] THEOR. 4. PROPOS. 6.
[162.] COROLLARIVM.
[163.] THEOR. 5. PROPOS. 7.
[164.] THEOR. 6. PROPOS. 8.
[165.] COROLLARIVM.
[166.] PROBL. 3. PROP. 9.
[167.] SCHOLIVM.
[168.] SEQVITVR TABVLA SINVVM RECTORVM per ſingula Quadrantis Minuta extenſa, & à Ioan. Regio-montano quondam ſupputata, nunc autem per me examinata, & pleriſque in locis caſtigata, atque correcta.
[169.] Gradus Quadrantis pro ſinubus
[170.] Gradus Quadrantis pro ſinubus rectis
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page |< < (115) of 532 > >|
THEOR. 4. PROPOS. 6.
DIFFERENTIA chordarũ duorum arcuũ
22Differentia
inter
chor-
das
duorũ
arcuũ
, quo-
alter
to
ſit mi-
nor
arcu
grad
. 120.
quáto
alter
maior
eſt,
ęquat
chot
arcus,
quo
alteru-
ter
dictorũ
arcuũ
dif-
fert
ab arcu
grad
. 120.
ſemicirculi, quorum alter tãto minor ſit arcu grad.
120. quanto alter maior eſt, æqualis eſt chordæ ar-
cus
, quo alteruter dictorum arcuum ab arcu grad.

120
.
differt.
IN ſemicirculo ABC, ſit arcus BA, grad. 120. arcus vero BD, eo tan-
to
minor, quanto arcus BE, maior eſt;
quorum chordæ BD, BE: abſcin-
daturq́ue
BF, ipſi BD, æqualis, &
iungantur rectæ AD, AE, AF. Dico EF,
differentiã
duarũ chor
124[Figure 124] darum BD, BE, æqua-
lem
eſſe chordæ AE,
vel
AD.
Cõpleto enim
circulo
, &
inſcriptotriã
gulo
æquilatero ABG,
cuius
vnum latus eſt
AB
, chorda arcus grad.
120. cum ſubtendat ter
tiã
circunferentiæ par-
tem
;
erit angulus AGB,
tertia
pars duorum re-
3332. primi.
21
. tertij.
ctorum.
Cum ergo ei æqualis ſit angulus AEB, in eodem cum illo

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