DuckCorp Dico

Found one definition

1.                 From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
                   
   
   
                   
                     
   cotangent /kˈəʊtandʒənt/ (cot /kˈɒt/, ) (ctg /sˌiːtˌiːdʒˈiː/, ) (ctn /sˌiːtˌiːˈɛn/)
   Kotangensfunktion <fem>, Kotangens <masc>, Cotangens <masc> [math.] cot,  /kˈɒt/ ctg,  /sˌiːtˌiːdʒˈiː/
            Note: Winkelfunktion
      Synonym: cotangent function
            Note: circular function