A harmonic wave is travelling on string 1. At the junction with string 2, it is partly reflected and partly transmitted. The linear mass density of string 2 is 9 times that of string 1, and that the boundary between the two strings is at x=0. If the expression for the incident wave is
yi=(3 cm)cos[(3.14 cm−1)x−(314 rad s−1)t]. What is the expression for the transmitted waves?