theorem :: FUZZY_5:42

{ f where f is Function of REAL,REAL, a, b, c, d is Real : for x being Real holds f . x = max (0,(min (1,((c * (sin ((a * x) + b))) + d)))) } c= { f where f, g is Function of REAL,REAL : for x being Real holds f . x = max (0,(min (1,(g . x)))) }