uses crt;
var z,a:real;
function f(a:real):real;
begin
f:=(sqr(a)+4)/(sqr(sin(sqr(a)+4)))*(sqr(cos(a)));
end;
begin
writeln('a= ');
readln(a);
z:=f(a);
writeln(z:0:10);
end.
uses crt;
var z,a:real;
function f(a:real):real;
begin
f:=(sqr(a)+4)/(sqr(sin(sqr(a)+4)))*(sqr(cos(a)));
end;
begin
writeln('a= ');
readln(a);
z:=f(a);
writeln(z:0:10);
end.