Var
A,B,H:real;
Begin
Write('A = ');ReadLn(A);
Write('B = ');ReadLn(B);
Write('H = ');ReadLn(H);
Repeat
WriteLn(A/Cos(A));
A:=A+H;
Until A>B;
End.
Var
N:integer;
Y:real;
Begin
Y:=1;
Write('N = ');ReadLn(N);
For N:= 1 to N do
Y:=Y*(1-1/(N*2));
Write('Y = ',Y);
End.