A Manual of Greek MathematicsDover Publications, 1963 - 552 pagina's |
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Pagina 399
... Ptolemy's Table of Chords is equivalent to a table of sines of angles of 1 ° , 10 , 10 , and so on by quarters of a degree to 90 ° . Cos a is , of course , sin ( 90 ° —ɑ ) and therefore equivalent to ( crd . 180 ° —2a ) . One of Ptolemy's ...
... Ptolemy's Table of Chords is equivalent to a table of sines of angles of 1 ° , 10 , 10 , and so on by quarters of a degree to 90 ° . Cos a is , of course , sin ( 90 ° —ɑ ) and therefore equivalent to ( crd . 180 ° —2a ) . One of Ptolemy's ...
Pagina 411
... Ptolemy deduces that ( crd . 1 ° ) is very nearly 0 ° 31 ′ 25 ′′ , and so , by the aid of the above pro- positions , he is able to complete his Table of Chords . To find approximately the chords of ... Ptolemy are included in vol PTOLEMY 411.
... Ptolemy deduces that ( crd . 1 ° ) is very nearly 0 ° 31 ′ 25 ′′ , and so , by the aid of the above pro- positions , he is able to complete his Table of Chords . To find approximately the chords of ... Ptolemy are included in vol PTOLEMY 411.
Pagina 415
... Ptolemy II Philadelphus ( 285–247 B.C. ) or Ptolemy III Euergetes I ( 247–222 ) or both , while the other was a barber of the time of Ptolemy Euergetes II , i.e. Ptolemy VII called Physcon ( died 117 B.C. ) . The author of the Belo ...
... Ptolemy II Philadelphus ( 285–247 B.C. ) or Ptolemy III Euergetes I ( 247–222 ) or both , while the other was a barber of the time of Ptolemy Euergetes II , i.e. Ptolemy VII called Physcon ( died 117 B.C. ) . The author of the Belo ...
Inhoudsopgave
INTRODUCTORY 157 | 5 |
NUMERICAL NOTATION AND PRACTICAL CAL | 11 |
PYTHAGOREAN ARITHMETIC | 36 |
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