Add the two waves of Problem 1 directly to find Eq. (7.17).Problem 1Using Eqs. (7.9), (7.1...

Add the two waves of Problem 1 directly to find Eq. (7.17).

Problem 1

Using Eqs. (7.9), (7.10), and (7.11), show that the resultant of the two waves

E1 = E01 sin [ωt−k(x + Δx)]

And

E2=E01 sin (ωt−kx) is