Typical backyard ants often create a network of

chemical trails for guidance. Extending outward from the nest, a

trail branches (bifurcates) repeatedly, with 60° between the

branches. If a roaming ant chances upon a trail, it can tell the way

to the nest at any branch point: If it is moving away from the nest, it

has two choices of path requiring a small turn in its travel direction,

either 30° leftward or 30° rightward. If it is moving toward the

nest, it has only one such choice. Figure 3-29 shows a typical ant

trail, with lettered straight sections of 2.0 cm length and symmetric

bifurcation of 60°. Path v is parallel to the y axis.What are the (a)

magnitude and (b) angle (relative to the positive direction of the

superimposed x axis) of an ant’s displacement from the nest (find it

in the figure) if the ant enters the trail at point A? What are the (c)

magnitude and (d) angle if it enters at point B?