Mathematics, 19.11.2020 19:20, esanchez2002fcb
There are 3 islands A, B,C. Island B is east of island A, 8 miles away. Island C is northeast of A, 5 miles away and northwest of B, 7 miles away. What is the bearing needed to navigate from island B to C? Round to the nearest degree
Answers: 2
(1)
- The distance from A to C, measured in miles.
- The distance from A to B, measured in miles.
- The distance from B to C, measured in miles.
- Bearing from island B to island C, measured in sexagesimal degrees. 
(2)
, 
, 
, then the bearing from island B to island C:![\theta = \cos^{-1}\left[\frac{(7\mi)^{2}+(8\,mi)^{2}-(5\,mi)^{2}}{2\cdot (8\,mi)\cdot (7\,mi)} \right]](/tpl/images/0913/7566/502a4.png)
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There are 3 islands A, B,C. Island B is east of island A, 8 miles away. Island C is northeast of A,...
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