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

Results 1 to 3 of 3

- February 22nd 2006, 04:18 PM #1

- Joined
- Feb 2006
- Posts
- 7

## 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?

- February 23rd 2006, 01:36 AM #2

- Joined
- Nov 2005
- From
- someplace
- Posts
- 14,972
- Thanks
- 5

- February 23rd 2006, 04:55 PM #3

- Joined
- Feb 2006
- Posts
- 7