1 . 如图,某人身高1.73m,他站的地点A和云南大理文笔塔塔底O在同水平线上,他直立时,测得塔顶M的仰角
(点E在线段
上,忽略眼睛到头顶之间的距离,下同).他沿线段
向塔前进100m到达点B,在点B直立时,测得塔顶M的仰角
:塔尖
的视角
(N是塔尖底,在线段
上).
(1)求塔高![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe787e57c26b11ec9dd85e8b540b86c.png)
________ ;
(2)此人在线段
上离点O________ 米,他直立看塔尖
的视角最大?
参考数据:
,
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06eea4c292cf869cf4bd2e549402bf4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4cfef623a9534b5708df5f95f1760a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f581aec293b1d2a5c4cbb57f58d65b65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/010813351d011be996bd94c9090efffe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4cfef623a9534b5708df5f95f1760a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/14/c6326968-9741-4a52-861f-f488ab42c86f.png?resizew=249)
(1)求塔高
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe787e57c26b11ec9dd85e8b540b86c.png)
(2)此人在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04abe549062c7a4a42b779a73d6d9349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a97afe1510663f74279f8eb6e4cf8346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39631c8b0f107dce57c8edc2ab0d8fd3.png)
您最近一年使用:0次
2022-06-07更新
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219次组卷
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5卷引用:福建省安溪一中、养正中学、惠安一中、泉州实验中学2021-2022学年高一下学期期中数学试题
福建省安溪一中、养正中学、惠安一中、泉州实验中学2021-2022学年高一下学期期中数学试题(已下线)高一数学下学期期中模拟试卷(第9-12章)-【题型分类归纳】2022-2023学年高一数学同步讲与练(苏教版2019必修第二册)(已下线)第六章 三角(压轴题专练)-单元速记·巧练(沪教版2020必修第二册)(已下线)11.3 余弦定理、正弦定理的应用-【帮课堂】(苏教版2019必修第二册)(已下线)专题1.8 解三角形的实际应用-重难点突破及混淆易错规避(人教A版2019必修第二册)
2 . 如图,为了测量河的宽度,在一岸边选定两点
望对岸的标记物
,测得
,
米,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b091b7f986b55574407646cc6ab97b8.png)
__________ ;这条河的宽度为__________ 米
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50c64298f6e7554ce11472f2197d45b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/897a87d38d3993ef4f300f9af099add0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac555e49868467ec93349e05724f8e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b091b7f986b55574407646cc6ab97b8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/a761f498-6b59-4818-b13c-34119c3a465c.png?resizew=196)
您最近一年使用:0次