{ TANGENS.PAS               Copyright (c) TrSek alias Zdeno Sekerak }
{ Zostavte program pre vypocet vztahu y = tg(x)/x                   }
{ tg(x) = sin(x)/cos(x)                                             }
{                                                                   }
{ Datum:04.02.2004                             http://www.trsek.com }
 
program tang;
uses crt;
var x:real;
    y:real;
 
begin
     ClrScr;
     Write('Zadaj x:');
     ReadLn( x );
 
     if( cos(x) = 0 ) or ( x = 0 )Then
        WriteLn('Nieje mozne vypocitat.')
     else
     begin
        y := (sin(x)/cos(x))/x;
        WriteLn('y=', y:8:3);
     end;
     ReadLn;
end.