Atan may refer to:
Mathematics
*
arctangent
In mathematics, the inverse trigonometric functions (occasionally also called ''antitrigonometric'', ''cyclometric'', or ''arcus'' functions) are the inverse functions of the trigonometric functions, under suitably restricted domains. Specific ...
(), a trigonometric function
**
atan2
In computing and mathematics, the function (mathematics), function atan2 is the 2-Argument of a function, argument arctangent. By definition, \theta = \operatorname(y, x) is the angle measure (in radians, with -\pi 0, \\ mu \arctan\left(\fr ...
, the two-argument function implementing the arctangent in many computer languages
Places
*
Atan, Armenia
*
Atan, Iran
Atan () is a village in Alamut-e Pain Rural District, Rudbar-e Alamut-e Sharqi District, Qazvin County, Qazvin province, Iran
Iran, officially the Islamic Republic of Iran (IRI) and also known as Persia, is a country in West Asia. ...
People
*
Atan Shansonga (born 1955), Zambian diplomat
*
Çağdaş Atan (born 1980), Turkish footballer
*
Cem Atan (born 1985), Turkish footballer
See also
*
Attan, a Pashtun and Afghan traditional dance
{{disambiguation, geo, surname, given name
Turkish-language surnames