Atan may refer to:
Places
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Atan, Armenia
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Atan, Iran
People
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Atan Shansonga (born 1955), Zambian diplomat
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Çağdaş Atan, Turkish footballer
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Cem Atan, Turkish footballer
Other
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Attan, a Pashtun and Afghan traditional dance
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arctangent
In mathematics, the inverse trigonometric functions (occasionally also called arcus functions, antitrigonometric functions or cyclometric functions) are the inverse functions of the trigonometric functions (with suitably restricted domains). S ...
, a trigonometric function
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atan2, the two-argument function implementing the arctangent in many computer languages
{{disambiguation, geo
Turkish-language surnames