Share via Share via... Twitter LinkedIn Facebook Pinterest Telegram WhatsApp Yammer RedditPrintPermalink × Arc Tangent atan( a ) Return the arc tangent of a. Description atan( a ) Return the arc tangent of a. Parameters a Angle in radians [-1 to +1] Return value arc tangent of a Example usage atan( 1 ) Returns 0.7854… ezeio2/expref/atan.txt Last modified: 2019-09-02 18:47by andreh Log In