小明同学借助无人机测量如意湖的宽度
.如图所示,一架水平飞行的无人机在
处测得下方河流的左岸
处的俯角为
,无人机沿水平线
方向继续飞行
米至
处,测得正前方河流右岸D处的俯角为
,线段
得长为无人机距地面的铅直高度,点
,
,
在同一条直线上其中
,
米.
;(结果保留根号)
(2)求河流的宽度
(结果精确到
米,参考数据:
,
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b3779b4ea5477aebfe85113b0de1d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a7de5b70003502e40b95b3b7d3d933.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83ce9cbb91b460994e69a1dd1ddf37bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
(2)求河流的宽度
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c894b7d6baa55c80c64e74748dad898.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460317e7c26f95b9b29cfe1a89b796d6.png)
更新时间:2024-05-05 18:11:28
|
【知识点】 仰角俯角问题(解直角三角形的应用)
相似题推荐
解答题-应用题
|
适中
(0.65)
【推荐1】在综合实践课上,数学兴趣小组用所学的数学知识来解决实际问题.实践报告如下:
请你帮助兴趣小组解决以上问题.
(参考数据:
,
,
,
)
实践报告
活动课题 | 测量两幢楼楼顶之间的距离 |
活动工具 | 测角仪、皮尺等 |
测量过程 | 【步骤一】如图,在楼![]() ![]() ![]() 【步骤二】利用测角仪测出楼顶B的仰角 ![]() ![]() 【步骤三】利用皮尺测出 ![]() ![]() ![]() |
解决问题 | 根据以上数据计算两幢楼楼顶B,D之间的距离. |
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc688dd55e75d251896d095cdbc4a772.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f416c30ca22d89236cb99926c9e44a35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f09b015976966c1101d971410aa1c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5039e48d834af7d1e7db5ab1c689fe.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,在河流的右岸边有一高楼
,左岸边有一坡度
的山坡
,点C与点B在同一水平面上,
与
在同一平面内.某数学兴趣小组为了测量楼
的高度,在坡底C处测得楼顶A的仰角为
,然后沿坡面
上行了
米(即
米)到达点D处,此时在D处测得楼顶A的仰角为
,求楼
的高度.
(参考数据:
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d833147a864a09b1a2fc648315203e33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1be5c7412a7d5e286508b8c8dac21a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e635bbbf250db098aac944cd36c7258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41555aacbfa7c338b1f49f439b320b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba5ca022b07a2fdd85b5a7f218be0f08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828e19b210fa63625bb3216bcdf5209c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3861f862e9441f2251500b0aba9a52e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/5068ee5b-6023-4a36-9a33-50f61af2ae37.png?resizew=290)
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