Program nomer_14
const Eps=1.E-5;
var k:integer;
v,x,s,s2:real;
Begin
writeln('vvedite chislo');
readln(x);
s2:=4*x/Pi;
k:=1;
repeat
v:=1/((2*k-1)*(2*k-1)-x);
k:=k+1;
until abs(v)<=Eps;
v:=v*s2;
writeln(v:12:10);
v:=pi*x/2;
writeln((sin(c)/cos(v)):12:10);
readln;
end.
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