Editing Thomas Fincke

{{short description|Danish mathematician and physicist (1561–1656)}}
[[File:Thomas Fincke.jpeg|thumb|Thomas Fincke.]]
'''Thomas Fincke''' (6 January 1561 – 24 April 1656) was a [[Denmark|Danish]]  [[mathematician]] and [[physicist]], and a professor at the [[University of Copenhagen]] for more than 60 years.<ref>{{cite web|url=  https://runeberg.org/dbl/5/0152.html   |title=  Fincke, Thomas, 1561-1656|publisher =   	Dansk biografisk Lexikon |access-date=August 1, 2019}}</ref>

==Biography==
[[Image:Finck - Geometriae rotundi libri XIIII, 1583 - 130535.jpg|thumb|''Geometriae rotundi libri XIIII'', 1583]] 
Thomas Jacobsen Fincke was born in [[Flensburg]] in [[Schleswig]].
Fincke was the son of Councillor Jacob Fincke  and Anna Thorsmede. He completed his primary schooling at Flensburg.  From 1577, he studied mathematics, rhetoric and other philosophical studies for five years  at the [[University of Strasbourg]].

Fincke's lasting achievement is found in his book ''Geometria rotundi'' (1583), in which he introduced the modern names of the [[trigonometric function]]s [[tangent (trigonometric function)|tangent]] and [[secant (trigonometry)|secant]]. In 1590, he became professor of mathematics at the [[University of Copenhagen]]. In 1603 he also obtained a professorship in medicine.

==Personal life==
He was married to Ivaria  Jungesdatter Ivers (1574–1614).
His son Jacob Fincke (1592–1663) was a professor of physics.
His daughters married scientist  [[Caspar Bartholin the Elder]] (1585–1629), botanist Jørgen Fuiren (1581–1628),  historian   [[Ole Worm]] (1588–1654)  and theologian Hans Brochmand (1594–1630).<ref>Jørgen Fuiren ''Dansk Biografisk Leksikon'' Retrieved December 1, 2020</ref>
<ref>{{cite web|url=     https://runeberg.org/dbl/19/0276.html|title=    Worm, Ole (Oluf), 1588-1654|publisher = Dansk biografisk Lexikon |access-date=August 1, 2019}}</ref><ref>Hans Brochmand - teolog ''Dansk Biografisk Leksikon'' Retrieved December 1, 2020</ref>

Fincke died at Copenhagen and was buried  at [[Church of Our Lady, Copenhagen|Vor Frue Kirke]].

==References==
{{reflist}}

==External links==
* {{MacTutor Biography|id=Fincke}}

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[[Category:1561 births]]
[[Category:1656 deaths]]
[[Category:16th-century Danish scientists]]
[[Category:16th-century Danish educators]]
[[Category:17th-century Danish scientists]]
[[Category:16th-century Danish mathematicians]]
[[Category:17th-century Danish mathematicians]]
[[Category:Danish mathematicians]]
[[Category:Danish physicists]]
[[Category:Science teachers]]
[[Category:Mathematics writers]]
[[Category:University of Strasbourg alumni]]
[[Category:Academic staff of the University of Copenhagen]]
[[Category:Rectors of the University of Copenhagen]]
[[Category:People from Flensburg]]
[[Category:Burials at the Church of Our Lady, Copenhagen]]


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