一艘轮船自西向东航行,在A处测得东偏北21.3°方向有一座小岛C,继续向东航行60海里到达B处,测得小岛C此时在轮船的东偏北63.5°方向上.之后,轮船继续向东航行多少海里,距离小岛C最近?(参考数据:sin21.3°≈
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022163850606518532/SYS201310221638506065185017_ST/0.png)
,tan21.3°≈
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022163850606518532/SYS201310221638506065185017_ST/1.png)
,sin63.5°≈
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022163850606518532/SYS201310221638506065185017_ST/2.png)
,tan63.5°≈2)
考点分析:
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