This is an allication of the cosine rule. You have a triangle with twoOriginally Posted bycinbad

sides one 300 and the other 200 miles, and the angle between them

is 40 degrees.

Substitute , and into the above and that's it

RonL

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- Feb 22nd 2006, 05:18 PM #1

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## please help with this question

Two airplanes leave an airport at the same time, and the angle between their flight paths is 40*.An hour later, one plane has traveled 300 miles, while the other has travelled 200 miles,each in a straight line. How far apart are the planes at this time?

- Feb 23rd 2006, 02:36 AM #2

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- Feb 23rd 2006, 05:55 PM #3

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