DuckCorp Dico

Found one definition

1.                 From German - English Ding/FreeDict dictionary ver. 1.9-fd1:
                   
   
   
                   
                     
   Tangens /tˈaŋəns/ (tan /tˈɑːn/, ) (tg /tˌeːɡˈeː/) <masc, n, sg>
    [math.] tangent <n>tan,  /tˈɑːn/
            Note: circular function
            Note: Winkelfunktion