![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102720338568728/SYS201311031027203385687018_ST/images0.png)
在海岸A处,发现北偏东45°方向,距离A
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102720338568728/SYS201311031027203385687018_ST/0.png)
nmile的B处有一艘走私船,在A处北偏西75°的方向,距离A2nmile的C处的缉私船奉命以
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102720338568728/SYS201311031027203385687018_ST/1.png)
nmile/h的速度追截走私船,此时,走私船正以10nmile/h的速度从B处向北偏东30°方向逃窜.
(1)求线段BC的长度;
(2)求∠ACB的大小;
(参考数值:
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102720338568728/SYS201311031027203385687018_ST/2.png)
)
(3)问缉私船沿北偏西多少度的方向能最快追上走私船?
考点分析:
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102720338568728/SYS201311031027203385687013_ST/0.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102720338568728/SYS201311031027203385687013_ST/1.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102720338568728/SYS201311031027203385687013_ST/2.png)
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