Related rates change in distance between two boats?

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SUMMARY

The discussion centers on calculating the rate of change in distance between two boats, one traveling south at 30 km/h and the other southwest at 40 km/h. The problem involves using trigonometric principles to form right triangles, as the paths of the boats create an angle. Specifically, after 30 minutes, the distance change can be determined using the Law of Cosines or related rates in calculus. The angle between the two paths is crucial for accurate calculations.

PREREQUISITES
  • Understanding of related rates in calculus
  • Knowledge of trigonometric functions and angles
  • Familiarity with the Law of Cosines
  • Basic concepts of vector motion
NEXT STEPS
  • Study the Law of Cosines for non-right triangles
  • Learn about related rates problems in calculus
  • Practice vector addition and motion in two dimensions
  • Explore trigonometric identities and their applications in physics
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Students studying calculus, particularly those focusing on related rates, as well as educators teaching vector motion and trigonometry in physics contexts.

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Homework Statement


Two boats leave a dock at the same tie. One goes south at 30 km/h and the other goes southwest at 40 km/h. What is the rate of change of the distance between the 2 boats, 30 minutes after they leave?

I know how to do these questions when it's a right triangle...but since this has one boat going south, and one going southwest...I don't know how to do it.
 
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I think you can make 2 right triangles by drawing a line from the position of first boat perpendicular to the path of the 2nd boat. Also, don't you know the angle between the paths of the two boats?
 
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