1pretium 1 ℞ CB vel
17[Figure 17]
CD. Eſt ergo inuen
ta terræ ſemidiameter
mill. Rom. ant. 4126,
paſſ. 238. poſito angu
lo ad A gr.89.m.36.
ſec 33. præcisè.
17[Figure 17]CD. Eſt ergo inuen
ta terræ ſemidiameter
mill. Rom. ant. 4126,
paſſ. 238. poſito angu
lo ad A gr.89.m.36.
ſec 33. præcisè.
XXXI
Prima me
thodus in
ueniendi tel
luris ſemi
diametrum,
per Trigo
nometriam
& Alge
bram.
Prima me
thodus in
ueniendi tel
luris ſemi
diametrum,
per Trigo
nometriam
& Alge
bram.
Quod ſi rem breuiùs
aſſequi velis, dato an
gulo obſeruato in A gr.
89. m. 36. ſec. 33, ſumatur AC vt Radius, &
CD, vt ſinus dati anguli. Et aſſumptâ BC
1 ℞ fiat vt Radius 100000.00000. ad dati an
guli ſinum 99997.67348, ita AC ped. 1 ℞
+ 480 ad CD ped. (99997.67348℞+4799888327040/100000.00000). Eſt
CD ipſi CB 1 ℞ æqualis, atque adeò vtrinque
demptâ fractione (99997.67348/100000.00000) ℞, remanet æqua
tio inter (232652/100000.00000) ℞ & ped. (4799888327040/100000.00000). Qua
rè factâ diuiſione habetur pretium 1 ℞ ped.
20631193 vt priùs.
aſſequi velis, dato an
gulo obſeruato in A gr.
89. m. 36. ſec. 33, ſumatur AC vt Radius, &
CD, vt ſinus dati anguli. Et aſſumptâ BC
1 ℞ fiat vt Radius 100000.00000. ad dati an
guli ſinum 99997.67348, ita AC ped. 1 ℞
+ 480 ad CD ped. (99997.67348℞+4799888327040/100000.00000). Eſt
CD ipſi CB 1 ℞ æqualis, atque adeò vtrinque
demptâ fractione (99997.67348/100000.00000) ℞, remanet æqua
tio inter (232652/100000.00000) ℞ & ped. (4799888327040/100000.00000). Qua
rè factâ diuiſione habetur pretium 1 ℞ ped.
20631193 vt priùs.