| Sci & Tech Chronology: In the year 980 |
Mathematics
Abu'l Wafa al Buzjani (a.k.a. Abu'l-Wefa) [b. Buzjan (Iran), June 10, 940, d. Baghdad (Iraq), July 15, 998] introduces the tangent ratio to Arabic mathematics and further develops spherical trigonometry, basing his work more on Indian trigonometry than on Greek. He translates Diophantus into Greek. See also 900 Mathematics; 1220 Mathematics.
| Wikipedia: 980 |
| Millennium: | 1st millennium |
|---|---|
| Centuries: | 9th century – 10th century – 11th century |
| Decades: | 950s 960s 970s – 980s – 990s 1000s 1010s |
| Years: | 977 978 979 – 980 – 981 982 983 |
| 980 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 980 CMLXXX |
| Ab urbe condita | 1733 |
| Armenian calendar | 429 ԹՎ ՆԻԹ |
| Bahá'í calendar | -864 – -863 |
| Berber calendar | 1930 |
| Buddhist calendar | 1524 |
| Burmese calendar | 342 |
| Byzantine calendar | 6488 – 6489 |
| Chinese calendar | 己卯年十二月十一日 (3616/3676-12-11) — to —
庚辰年十一月廿二日(3617/3677-11-22) |
| Coptic calendar | 696 – 697 |
| Ethiopian calendar | 972 – 973 |
| Hebrew calendar | 4740 – 4741 |
| Hindu calendars | |
| - Vikram Samvat | 1035 – 1036 |
| - Shaka Samvat | 902 – 903 |
| - Kali Yuga | 4081 – 4082 |
| Holocene calendar | 10980 |
| Iranian calendar | 358 – 359 |
| Islamic calendar | 369 – 370 |
| Japanese calendar | |
| Korean calendar | 3313 |
| Thai solar calendar | 1523 |
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| Shopping: 980 |
 | Angel Fall (waterfall) |
| Avicenna (Persian physician and Neo-Platonist philosopher) |
| Amesbury (region, England) |
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 | Sci & Tech Chronology. History of Science and Technology, edited by Bryan Bunch and Alexander Hellemans. Copyright © 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. Read more |
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