我市在凤城河风景区举办了端午节赛龙舟活动,小亮在河畔的一幢楼上看到一艘龙舟迎面驶来,他在高出水面
的
处测得在
处的龙舟俯角为
;他登高
到正上方的
处测得驶至
处的龙舟俯角为
,问两次观测期间龙舟前进了多少?(结果精确到
,参考数据:
,
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc14c6a20e143b0ebf84957f28ce9097.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/2690e1a00ef032f0d6a0082e4eee46b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85ed4c5f9468096d1c856f187ce75402.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb94bd9eb80fb9f5f02f518bb8f2211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef959a420dc4a40d40e1960a68d1acce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb1689b1a9cfb01e3e891453b3d667cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7379d1eed8fa2f116f84fe4f2874fb1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/055ed3df1b9f8e8267f73e291e7e3356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aec9fc9ccda1041af9901a4bcf6df4e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/13/384fced0-4331-4f9f-8ad3-929f341ce19b.png?resizew=196)
2020·江苏泰州·中考真题 查看更多[7]
江苏省泰州市2020年中考数学试题(已下线)【万唯】陕西省真题-卷子-子卷31(已下线)【万唯原创】2021年陕西省试题研究-讲册-第二部分 基础解答题型五 1湘教版2020-2021学年九年级数学上册第4章 锐角三角函数【真题训练】2022年江苏省连云港市赣榆区中考二模数学试题(已下线)专题22 锐角三角函数-三年(2020-2022)中考数学真题分项汇编(江苏专用)(已下线)专题26 解直角三角形的实际应用三年中考真题-【微专题】2022-2023学年九年级数学下册常考点微专题提分精练(苏科版)
更新时间:2020-07-17 21:33:34
|
【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-问答题
|
适中
(0.65)
【推荐1】数学兴趣小组到一公园测量塔楼高度.如图所示,塔楼剖面和台阶的剖面在同一平面,在台阶底部点A处测得塔楼顶端点E的仰角
,台阶
长26米,台阶坡面
的坡度
,然后在点B处测得塔楼顶端点E的仰角
,则
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/4f2bf5d6-2c4f-4aaf-8607-7fc4e3fa8f26.png?resizew=197)
(1)点B到
的距离为多少米?
(2)塔顶到地面的高度
约为多少米?
(参考数据:
,
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a8e0a138ce5b7f968e5198cacddb02c.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/f4dd80daefa23a61d300a829f77bbfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99caefaa3c956ae92d5f738aaced82ab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/4f2bf5d6-2c4f-4aaf-8607-7fc4e3fa8f26.png?resizew=197)
(1)点B到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
(2)塔顶到地面的高度
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ccdab89f13b83f1dfa7b881b2b22420.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3488411113fa3042d5f6c69e83c459e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98d2263cd2b25859951ea2eee007c06f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcc7cf3e7b616e57e1e351eb39f3279.png)
您最近一年使用:0次
解答题-应用题
|
适中
(0.65)
【推荐2】如图,为测量古塔的高度
,在某楼房点
处测得古塔顶端
点的仰角为
,点
到地面的距离(
)为
米,从地面的点
处测得古塔顶端
点的仰角为
,
米,已知点
,
,
,
,
在同一平面内,求古塔的高度
.(结果精确到
米.参考数据:
,
,
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aee6e4e9350a2665df8597ff8045bbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8d9855bf67d6e1998a754da17a1c12a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a87796ee30e6c5d5e6b6285b32abe10c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf9ce15bced23b22e27ffc102ee8033.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd246e1ddf8411fd121fc258b3675dbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9f38803670400abbb624dea1f9931b7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/7d91e38e-adad-4412-91d6-91c1d7f86b29.png?resizew=277)
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