A history of Greek mathematics Vol.II from Aristarchus to Diophantus by Heath, Thomas Little, Sir, 1921
MACEDONIA is GREECE and will always be GREECE- (if they are desperate to steal a name, Monkeydonkeys suits them just fine) ΚΑΤΩ Η ΣΥΓΚΥΒΕΡΝΗΣΗ ΤΩΝ ΠΡΟΔΟΤΩΝ!!! ΦΕΚ,ΚΚΕ,ΚΝΕ,ΚΟΜΜΟΥΝΙΣΜΟΣ,ΣΥΡΙΖΑ,ΠΑΣΟΚ,ΝΕΑ ΔΗΜΟΚΡΑΤΙΑ,ΕΓΚΛΗΜΑΤΑ,ΔΑΠ-ΝΔΦΚ, MACEDONIA,ΣΥΜΜΟΡΙΤΟΠΟΛΕΜΟΣ,ΠΡΟΣΦΟΡΕΣ,ΥΠΟΥΡΓΕΙΟ,ΕΝΟΠΛΕΣ ΔΥΝΑΜΕΙΣ,ΣΤΡΑΤΟΣ, ΑΕΡΟΠΟΡΙΑ,ΑΣΤΥΝΟΜΙΑ,ΔΗΜΑΡΧΕΙΟ,ΝΟΜΑΡΧΙΑ,ΠΑΝΕΠΙΣΤΗΜΙΟ,ΛΟΓΟΤΕΧΝΙΑ,ΔΗΜΟΣ,LIFO,ΛΑΡΙΣΑ, ΠΕΡΙΦΕΡΕΙΑ,ΕΚΚΛΗΣΙΑ,ΟΝΝΕΔ,ΜΟΝΗ,ΠΑΤΡΙΑΡΧΕΙΟ,ΜΕΣΗ ΕΚΠΑΙΔΕΥΣΗ,ΙΑΤΡΙΚΗ,ΟΛΜΕ,ΑΕΚ,ΠΑΟΚ,ΦΙΛΟΛΟΓΙΚΑ,ΝΟΜΟΘΕΣΙΑ,ΔΙΚΗΓΟΡΙΚΟΣ,ΕΠΙΠΛΟ, ΣΥΜΒΟΛΑΙΟΓΡΑΦΙΚΟΣ,ΕΛΛΗΝΙΚΑ,ΜΑΘΗΜΑΤΙΚΑ,ΝΕΟΛΑΙΑ,ΟΙΚΟΝΟΜΙΚΑ,ΙΣΤΟΡΙΑ,ΙΣΤΟΡΙΚΑ,ΑΥΓΗ,ΤΑ ΝΕΑ,ΕΘΝΟΣ,ΣΟΣΙΑΛΙΣΜΟΣ,LEFT,ΕΦΗΜΕΡΙΔΑ,ΚΟΚΚΙΝΟ,ATHENS VOICE,ΧΡΗΜΑ,ΟΙΚΟΝΟΜΙΑ,ΕΝΕΡΓΕΙΑ, ΡΑΤΣΙΣΜΟΣ,ΠΡΟΣΦΥΓΕΣ,GREECE,ΚΟΣΜΟΣ,ΜΑΓΕΙΡΙΚΗ,ΣΥΝΤΑΓΕΣ,ΕΛΛΗΝΙΣΜΟΣ,ΕΛΛΑΔΑ, ΕΜΦΥΛΙΟΣ,ΤΗΛΕΟΡΑΣΗ,ΕΓΚΥΚΛΙΟΣ,ΡΑΔΙΟΦΩΝΟ,ΓΥΜΝΑΣΤΙΚΗ,ΑΓΡΟΤΙΚΗ,ΟΛΥΜΠΙΑΚΟΣ, ΜΥΤΙΛΗΝΗ,ΧΙΟΣ,ΣΑΜΟΣ,ΠΑΤΡΙΔΑ,ΒΙΒΛΙΟ,ΕΡΕΥΝΑ,ΠΟΛΙΤΙΚΗ,ΚΥΝΗΓΕΤΙΚΑ,ΚΥΝΗΓΙ,ΘΡΙΛΕΡ, ΠΕΡΙΟΔΙΚΟ,ΤΕΥΧΟΣ,ΜΥΘΙΣΤΟΡΗΜΑ,ΑΔΩΝΙΣ ΓΕΩΡΓΙΑΔΗΣ,GEORGIADIS,ΦΑΝΤΑΣΤΙΚΕΣ ΙΣΤΟΡΙΕΣ, ΑΣΤΥΝΟΜΙΚΑ,ΦΙΛΟΣΟΦΙΚΗ,ΦΙΛΟΣΟΦΙΚΑ,ΙΚΕΑ,ΜΑΚΕΔΟΝΙΑ,ΑΤΤΙΚΗ,ΘΡΑΚΗ,ΘΕΣΣΑΛΟΝΙΚΗ,ΠΑΤΡΑ, ΙΟΝΙΟ,ΚΕΡΚΥΡΑ,ΚΩΣ,ΡΟΔΟΣ,ΚΑΒΑΛΑ,ΜΟΔΑ,ΔΡΑΜΑ,ΣΕΡΡΕΣ,ΕΥΡΥΤΑΝΙΑ,ΠΑΡΓΑ,ΚΕΦΑΛΟΝΙΑ, ΙΩΑΝΝΙΝΑ,ΛΕΥΚΑΔΑ,ΣΠΑΡΤΗ,ΠΑΞΟΙ
MACEDONIA is GREECE and will always be GREECE- (if they are desperate to steal a name, Monkeydonkeys suits them just fine)
ΚΑΤΩ Η ΣΥΓΚΥΒΕΡΝΗΣΗ ΤΩΝ ΠΡΟΔΟΤΩΝ!!!
ΦΕΚ,ΚΚΕ,ΚΝΕ,ΚΟΜΜΟΥΝΙΣΜΟΣ,ΣΥΡΙΖΑ,ΠΑΣΟΚ,ΝΕΑ ΔΗΜΟΚΡΑΤΙΑ,ΕΓΚΛΗΜΑΤΑ,ΔΑΠ-ΝΔΦΚ, MACEDONIA,ΣΥΜΜΟΡΙΤΟΠΟΛΕΜΟΣ,ΠΡΟΣΦΟΡΕΣ,ΥΠΟΥΡΓΕΙΟ,ΕΝΟΠΛΕΣ ΔΥΝΑΜΕΙΣ,ΣΤΡΑΤΟΣ, ΑΕΡΟΠΟΡΙΑ,ΑΣΤΥΝΟΜΙΑ,ΔΗΜΑΡΧΕΙΟ,ΝΟΜΑΡΧΙΑ,ΠΑΝΕΠΙΣΤΗΜΙΟ,ΛΟΓΟΤΕΧΝΙΑ,ΔΗΜΟΣ,LIFO,ΛΑΡΙΣΑ, ΠΕΡΙΦΕΡΕΙΑ,ΕΚΚΛΗΣΙΑ,ΟΝΝΕΔ,ΜΟΝΗ,ΠΑΤΡΙΑΡΧΕΙΟ,ΜΕΣΗ ΕΚΠΑΙΔΕΥΣΗ,ΙΑΤΡΙΚΗ,ΟΛΜΕ,ΑΕΚ,ΠΑΟΚ,ΦΙΛΟΛΟΓΙΚΑ,ΝΟΜΟΘΕΣΙΑ,ΔΙΚΗΓΟΡΙΚΟΣ,ΕΠΙΠΛΟ, ΣΥΜΒΟΛΑΙΟΓΡΑΦΙΚΟΣ,ΕΛΛΗΝΙΚΑ,ΜΑΘΗΜΑΤΙΚΑ,ΝΕΟΛΑΙΑ,ΟΙΚΟΝΟΜΙΚΑ,ΙΣΤΟΡΙΑ,ΙΣΤΟΡΙΚΑ,ΑΥΓΗ,ΤΑ ΝΕΑ,ΕΘΝΟΣ,ΣΟΣΙΑΛΙΣΜΟΣ,LEFT,ΕΦΗΜΕΡΙΔΑ,ΚΟΚΚΙΝΟ,ATHENS VOICE,ΧΡΗΜΑ,ΟΙΚΟΝΟΜΙΑ,ΕΝΕΡΓΕΙΑ, ΡΑΤΣΙΣΜΟΣ,ΠΡΟΣΦΥΓΕΣ,GREECE,ΚΟΣΜΟΣ,ΜΑΓΕΙΡΙΚΗ,ΣΥΝΤΑΓΕΣ,ΕΛΛΗΝΙΣΜΟΣ,ΕΛΛΑΔΑ, ΕΜΦΥΛΙΟΣ,ΤΗΛΕΟΡΑΣΗ,ΕΓΚΥΚΛΙΟΣ,ΡΑΔΙΟΦΩΝΟ,ΓΥΜΝΑΣΤΙΚΗ,ΑΓΡΟΤΙΚΗ,ΟΛΥΜΠΙΑΚΟΣ, ΜΥΤΙΛΗΝΗ,ΧΙΟΣ,ΣΑΜΟΣ,ΠΑΤΡΙΔΑ,ΒΙΒΛΙΟ,ΕΡΕΥΝΑ,ΠΟΛΙΤΙΚΗ,ΚΥΝΗΓΕΤΙΚΑ,ΚΥΝΗΓΙ,ΘΡΙΛΕΡ, ΠΕΡΙΟΔΙΚΟ,ΤΕΥΧΟΣ,ΜΥΘΙΣΤΟΡΗΜΑ,ΑΔΩΝΙΣ ΓΕΩΡΓΙΑΔΗΣ,GEORGIADIS,ΦΑΝΤΑΣΤΙΚΕΣ ΙΣΤΟΡΙΕΣ, ΑΣΤΥΝΟΜΙΚΑ,ΦΙΛΟΣΟΦΙΚΗ,ΦΙΛΟΣΟΦΙΚΑ,ΙΚΕΑ,ΜΑΚΕΔΟΝΙΑ,ΑΤΤΙΚΗ,ΘΡΑΚΗ,ΘΕΣΣΑΛΟΝΙΚΗ,ΠΑΤΡΑ, ΙΟΝΙΟ,ΚΕΡΚΥΡΑ,ΚΩΣ,ΡΟΔΟΣ,ΚΑΒΑΛΑ,ΜΟΔΑ,ΔΡΑΜΑ,ΣΕΡΡΕΣ,ΕΥΡΥΤΑΝΙΑ,ΠΑΡΓΑ,ΚΕΦΑΛΟΝΙΑ, ΙΩΑΝΝΙΝΑ,ΛΕΥΚΑΔΑ,ΣΠΑΡΤΗ,ΠΑΞΟΙ
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BEGINNINGS OF TRIGONOMETRY 253<br />
forms ' '<br />
liber aggregativus ' and liber cle principiis universalibus'.<br />
Each <strong>of</strong> these expressions may well mean the work<br />
<strong>of</strong> Apollonius which Marinus refers <strong>to</strong> as the General<br />
'<br />
Treatise ' (fj kccOoXov wpayfjiaTeia). There is no apparent<br />
reason <strong>to</strong> doubt that the remark in question was really<br />
contained in Menelaus's original work ; and, even if it is an<br />
Arabian interpolation, it is not likely <strong>to</strong> have been made<br />
without some definite authority. If then Apollonius was the<br />
discoverer <strong>of</strong> the proposition, the fact affords some ground for<br />
thinking that the beginnings <strong>of</strong> trigonometry go as far back,<br />
at least, as Apollonius. Tannery 1 indeed suggested that not<br />
only Apollonius but Archimedes before him may have compiled<br />
a ' table <strong>of</strong> chords ', or at least shown the way <strong>to</strong> such<br />
a compilation, Archimedes in the work <strong>of</strong> which we possess<br />
only a fragment in the Measurement <strong>of</strong> a Circle^ and Apollonius<br />
in the cdkv<strong>to</strong>klov, where he gave an approximation <strong>to</strong> the value<br />
<strong>of</strong> tt closer than that obtained <strong>by</strong> Archimedes; Tannery<br />
compares the Indian Table <strong>of</strong> Sines in the Surya-Siddhdnta,<br />
where the angles go <strong>by</strong> 24ths <strong>of</strong> a right angle (l/24th = 3° 45',<br />
2/24ths=7° 30', &c), as possibly showing <strong>Greek</strong> influence.<br />
This is, however, in the region <strong>of</strong> conjecture ; the first person<br />
<strong>to</strong> make systematic use <strong>of</strong> trigonometry is, so far as we know,<br />
Hipparchus.<br />
Hipparchus, the greatest astronomer <strong>of</strong> antiquity, was<br />
born at Nicaea in Bithynia. The period <strong>of</strong> his activity is<br />
indicated <strong>by</strong> references in P<strong>to</strong>lemy <strong>to</strong> observations made <strong>by</strong><br />
him the limits <strong>of</strong> which are <strong>from</strong> 161 B.C. <strong>to</strong> 126 B.C. P<strong>to</strong>lemy<br />
further says that <strong>from</strong> Hipparchus's time <strong>to</strong> the beginning <strong>of</strong><br />
the reign <strong>of</strong> An<strong>to</strong>ninus Pius (a.d. 138) was 265 years. 2 The<br />
best and most important observations made <strong>by</strong> Hipparchus<br />
were made at Rhodes, though an observation <strong>of</strong> the vernal<br />
equinox at Alexandria on March 24, 146 B.C., recorded <strong>by</strong> him<br />
may have been his own. His main contributions <strong>to</strong> theoretical<br />
and practical astronomy can here only be indicated in the<br />
briefest manner.<br />
1<br />
Tannery, Recherches sur Vhist. de Vastronomie ancienne, p. 64.<br />
2 P<strong>to</strong>lemy, Syntaxis, vii. 2 (vol. ii, p. 15).<br />
254 TRIGONOMETRY<br />
The work <strong>of</strong> Hipparchus.<br />
Discovery <strong>of</strong> precession.<br />
1. The greatest is perhaps his discovery <strong>of</strong> the precession<br />
<strong>of</strong> the equinoxes. Hipparchus found that the bright star<br />
Spica was, at the time <strong>of</strong> his observation <strong>of</strong> it, 6° distant<br />
<strong>from</strong> the autumnal equinoctial point, whereas he deduced <strong>from</strong><br />
observations recorded <strong>by</strong> Timocharis that .Timocharis had<br />
made the distance 8°. Consequently the motion had amounted<br />
<strong>to</strong> 2° in the period between Timocharis's observations, made in<br />
283 or 295 B.C., and 129/8 B.C., a period, that is, <strong>of</strong> 154 or<br />
166 years; this gives about 46-8" or 43-4" a year, as compared<br />
with the true value <strong>of</strong> 50-3757".<br />
Calculation <strong>of</strong> mean lunar month.<br />
2. The same discovery is presupposed in his work On the<br />
length <strong>of</strong> the Year, in which, <strong>by</strong> comparing an observation<br />
<strong>of</strong> the summer solstice <strong>by</strong> <strong>Aristarchus</strong> in 281/0 B.C. with his<br />
own in 136/5 B.C., he found that after 145 years (the interval<br />
between the two dates) the summer solstice occurred half<br />
a day-and-night earlier than it should on the assumption <strong>of</strong><br />
exactly 365J days <strong>to</strong> the year; hence he concluded that the<br />
tropical year contained about ^§o^n °f a day-and-night less<br />
than 3 65\ days. This agrees very nearly with Censorinus's<br />
statement that Hipparchus's cycle was 304 years, four times<br />
the 76 years <strong>of</strong> Callippus, but with 111,035 days in it<br />
instead <strong>of</strong> 111,036 (<br />
= 27,759x4). Counting in the 304 years<br />
12x304 + 112 (intercalary) months, or 3,760 months in all,<br />
Hipparchus made the mean lunar month 29 days 12 hrs.<br />
44 min. 2-| sec, which is less than a second out in comparison<br />
with the present accepted figure <strong>of</strong> 29-53059 days!<br />
3. Hipparchus attempted a new determination <strong>of</strong> the sun's<br />
motion <strong>by</strong> means <strong>of</strong> exact equinoctial and solstitial observations;<br />
he reckoned the eccentricity <strong>of</strong> the sun's course<br />
and fixed the apogee at the point 5° 30' <strong>of</strong> Gemini. More<br />
remarkable still was his investigation <strong>of</strong> the moon's<br />
course. He determined the eccentricity and the inclination<br />
<strong>of</strong> the orbit <strong>to</strong> the ecliptic, and <strong>by</strong> means <strong>of</strong> records <strong>of</strong><br />
observations <strong>of</strong> eclipses determined the moon's period with<br />
extraordinary accuracy (as remarked above). We now learn