The phase difference between two waves, represented by
y1 = 10–6 sin{100 t + (x/50) + 0.5} m
y2 = 10–6 cos{100 t + (x/50)} m
where x is expressed in metres and t is expressed in seconds, is approximately
(a) 1.5 radians
(b) 1.07 radians
(c) 2.07 radians
(d) 0.5 radians
