PROGRAM BISECT(INPUT,OUTPUT);
CONST EPS =1E-14;
VAR X,Y:REAL;
FUNCTION ZERO(FUNCTION F:REAL;A,B:REAL):REAL;
VAR X,Z:REAL;S:BOOLEAN;
BEGIN
S:=F(A)<0;
  REPEAT X:=(A+B)/2.0;
  Z:=F(X);
  IF (Z<0)=S THEN A:=X ELSE B:=X
  UNTIL ABS(A-B)<EPS;
ZERO:=X
END;
BEGIN
READ(X,Y);
WRITELN(X,Y,ZERO(SIN,X,Y));
READ(X,Y);
WRITELN(X,Y,ZERO(COS,X,Y))
END.