如图1,这是一款教学设备的实物图,该教学设备是由底座
,支撑臂
,连杆
,悬臂
和安装在
处的摄像头组成,图2是该款设备放置在水平桌面上的平面示意图.已知支撑臂
与底座
的夹角
,底座高为
,连杆
,水平桌面
,连杆
与悬臂
的夹角
,求点
到水面桌面
的距离
.(结果精确到
,参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/944a25c04b79e09bc39c9f24924ed62d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/976260cbf5e30856d4fd37a4b0a671a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8326075cde2b74f2d495da47c02be0af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/947aed0181a8c0bd81c6ebeba8d1ddc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da3cdbaad1b0ef73d017bbe93ecbd5ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638f89746a35b59f1b492ef20ca85156.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dd58f9f2603b2a02db40ca2bf9d17a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5355abd43ea7f56e4c13dbb84240c803.png)
更新时间:2024-05-24 19:00:37
|
【知识点】 其他问题(解直角三角形的应用)
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解答题-问答题
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适中
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【推荐1】如图,星海湾大桥是中国首座海上地锚式悬索跨海大桥和中国首座双层通车钢桁架悬索桥,是大连市“七纵七横”道路网中的重要一横.已知大桥主塔
垂直于上层桥面于点B,小明要测量主塔
的高度,他在上层桥面C处测得主塔顶端A的仰角约
,在D处测得主塔顶端A的仰角约
,已知
米,求主塔
的高度(结果保留整数).(参考数据:
,
,
,
,
,
)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/4/6f0accc9-862e-42e1-bc1b-3e9aaf0d4bc0.png?resizew=213)
![](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/d7451b9d94e28503b8ac931632ff9dbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0be75f41c333a533e197da7f2ec5da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4f091ffb7a58e96eab4ab1379737c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1b659daf103d2d3f906c274a2532e37.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e15359371f06709efb628143fccf02f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55315e2bb934c29dda1a66c094617f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bed9e34307e16a9b7c98256657211ebd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/4/6f0accc9-862e-42e1-bc1b-3e9aaf0d4bc0.png?resizew=213)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/4/da46a90c-c340-42d1-9d9b-8cbc30e89aad.png?resizew=162)
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解答题-问答题
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适中
(0.65)
真题
【推荐2】如图,某公司入口处有一斜坡AB,坡角为12°,AB的长为3m,施工队准备将斜坡修成三级台阶,台阶高度均为hcm,深度均为30cm,设台阶的起点为C.
(1)求AC的长度;
(2)求每级台阶的高度h.
(参考数据:sin12°≈0.2079,cos12°≈0.9781,tan12°≈0.2126.结果都精确到0.1cm)
(1)求AC的长度;
(2)求每级台阶的高度h.
(参考数据:sin12°≈0.2079,cos12°≈0.9781,tan12°≈0.2126.结果都精确到0.1cm)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/31/b75e0728-62a8-4fe3-b64e-3bf04b7c00ed.png?resizew=276)
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