Question: Add the two waves of Problem 7.7 directly to find Eq. (7.17). Data from Problem 7.7 Using Eqs. (7.9), (7.10), and (7.11), show that the

Add the two waves of Problem 7.7 directly to find Eq. (7.17).

k Δr Δx E = 2E01 cos (7.17) sin wt – k x +

Data from Problem 7.7

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

E1 = E01 sin [wt – k(x + Ax)] %3D

and

k r x E = 2E01 cos (7.17) sin wt k x

is

+ E1 = E01 sin [wt k(x + Ax)] %3D

k r x E = 2E01 cos (7.17) sin wt k x + E1 = E01 sin [wt k(x + Ax)] %3D

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