张晓华同学骑电动自行车以24km/h的速度沿着正北方向的公路行驶,在点A处望见电视塔S在电动车的北偏东30°方向上,15min后到点B处望见电视塔在电动车的北偏东75°方向上,则电动车在点B时与电视塔S的距离是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/9c65072c-0c90-462a-8bb9-6b2e2ba44f20.png?resizew=144)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/9c65072c-0c90-462a-8bb9-6b2e2ba44f20.png?resizew=144)
A.2km | B.![]() | C.3km | D.![]() |
更新时间:2019-01-11 16:01:36
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【推荐1】海洋中有A,
,
三座灯塔.其中A,
之间距离为
,在A处观察
,其方向是南偏东
,观察
,其方向是南偏东
,在
处观察
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,
,
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【推荐2】如图,为测量某公园内湖岸边
两处的距离,一无人机在空中
点处测得
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A.![]() | B.![]() |
C.![]() | D.![]() |
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