CPM Homework Help : INT3 Problem 11-12

A plane is currently $250$ miles from its destination. If it continues on its current course, it will travel another $300$ miles and end up $75$ miles away from its destination. What adjustment does the plane need to make in its course direction to arrive at its destination?

Hint:

Draw a triangle.

More Help:

Use the Law of Cosines.

Answer:

The plane needs to change its course $11.72^\circ$ .