EntityQ445933· pop 7· linked from 1 articlesAtanSign in to saveAtan may refer to:Article4 sectionsContentsMathematicsPlacesPeopleSee alsoAtan may refer to:==Mathematics== arctangent (), a trigonometric function atan2, the two-argument function implementing the arctangent in many computer languagesRead full article (6 paragraphs)Connectionsinverse trigonometric functionEntityAttanEntityCategoriesPlace name disambiguation pagesTurkish-language surnames