Chapter 15, Problem 79E

(a)

To determine

The values of $x$ that are the nodes of $y_1$.

(b)

To determine

The values of $x$ that are the nodes of $y_2$.

(c)

To determine

To plot: The graph of the total wave at $t=0$, $t=\frac{1}{8}{f}_1$, $t=\frac{1}{4}{f}_1$, $t=\frac{3}{8}{f}_1$ and $t=\frac{1}{2}{f}_1$.

(d)

To determine

To explain: Whether the sum of the two standing waves $y_1$ and $y_2$ produce a standing wave or not.