King Line, Poor Line, and Easy Line, three cruise ships, are on the ocean. King Line is tr...

King Line, Poor Line, and Easy Line, three cruise ships, are on the ocean. King Line is traveling in the direction of the Easy Line when he receives a radio message to help Poor Line. The distance from the King Line to the Poor Line is 56 miles, the distance from the King Line to the Easy Line is 46 miles, while the distance between the Poor Line and the Easy Line is 30 miles. What is the angle that King Line will use to change its course to turn in the direction of Poor Line ?