图
是某小区门口的车辆自动识别系统,主要有可旋转高清摄像机和其下方固定的显示屏
图
是其结构示意图,摄像机长
,点
是摄像机旋转轴心,
为
的中点,显示屏的上沿
与
平行,
,
的连接杆为
,
,
,
,点
到地面的距离为
,若
与水平地面所成的角的度数为
请根据以上数据求镜头
到地面的距离.
参考数据:
,
,
,结果保留一位小数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/739c4d0dc2cac3bfd94a87f1d0d0633b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efeac524f12d236f4a0e1ff9c8d0123f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/178e3fa2e4de57a4c067e79be7d798e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011205e7d4a723d966bff30912b43643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/795e740cb57615d48c36b416d5b93a9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9871f2a312aaf3a19b40e4fb1a7693b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a13ececd52896c5cb390368d6bf81aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a49743c3433d9e3d95f5cc0bb87b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3935dc13ab225c9806bef648010c996.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02ee7ea1f83aac6b530fc2178ce89f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/9/ea41cba6-0fc3-4ded-9531-2137a6bf66aa.png?resizew=291)
更新时间:2023-06-07 10:36:18
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】在矩形
中,
,
,
是
边上一点,连接
,过点
作
交
于点
,作
,交射线
于点
,交射线
于点
.
![](https://img.xkw.com/dksih/QBM/2021/5/11/2718507948752896/2786890114940928/STEM/77f4f30e-ea7b-4ac6-a2cc-7efae943a22a.png)
![](https://img.xkw.com/dksih/QBM/2021/5/11/2718507948752896/2786890114940928/STEM/7dab28ad-f6db-45c3-8e13-b7ed3c60dcdb.png)
(1)如图1,当点
与点
重合时,求
的长;
(2)如图2,当点
在线段
上时,用等式表示线段
与
之间的数量关系(其中
),并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40fe2cc764de5fa58e9d90d750c5c528.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c39d5e0527c067b430e0d8e3d9cfe8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/2021/5/11/2718507948752896/2786890114940928/STEM/77f4f30e-ea7b-4ac6-a2cc-7efae943a22a.png)
![](https://img.xkw.com/dksih/QBM/2021/5/11/2718507948752896/2786890114940928/STEM/7dab28ad-f6db-45c3-8e13-b7ed3c60dcdb.png)
(1)如图1,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)如图2,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3600206fac97a6d5bdd3197c0bfb7dbd.png)
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解答题-问答题
|
适中
(0.65)
【推荐1】为了缓解合肥市区内一些主要路段交通拥挤的现状,交警队在一些主要路口设立了交通路况显示牌(如图)已知立杆
高度是
,从侧面D点测得显示牌顶端C点和底端B点的仰角分别是
和
.求路况显示牌
的高度.(
,结果保留一位小数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6244c4be2c661dc2166885d65bbad9c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47bb3f35e3db7c1f3a3dd3eb20151b5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/8/727f709b-8948-4aef-8c1c-d08adb269718.png?resizew=225)
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解答题-问答题
|
适中
(0.65)
真题
【推荐2】如图,为了测量某条河的对岸边C,D两点间的距离,在河的岸边与
平行的直线
上取两点A,B,测得
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d03754735f9cb648b0e7174369505acf.png)
,量得
长为70米.求C,D两点间的距离(参考数据:
,
,
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c8d86d304069fb4b15ca518ad55d25.png)
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