风电项目对于调整能源结构和转变经济发展方式具有重要意义.某电力部门在一处坡角为
的坡地新安装了一架风力发电机,如图1.某校实践活动小组对该坡地上的这架风力发电机的塔杆高度进行了测量,图2为测量示意图.已知斜坡
长16米,在地面点
处测得风力发电机塔杆顶端
点的仰角为
,利用无人机在点
的正上方53米的点
处测得
点的俯角为
,求该风力发电机塔杆
的高度.(参考数据:
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48cf21017ebe712348fbe500113dbc59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860f577d9669bed9491bf0cbac5ce927.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b5e0c1ba6c2081d16bf9375e79f624.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf4ad7bad12e9b4e7b9b991a4735583f.png)
2023·山东烟台·中考真题 查看更多[13]
2023年山东省烟台市中考数学真题(已下线)专题19锐角三角函数(精选45道)-学易金卷:三年(2021-2023)中考数学真题分项汇编【山东专用】陕西省西安市曲江第一学校2023-2024学年度九年级上学期第二次月考数学试题山东省青岛市崂山区崂山区实验学校2023-2024学年九年级上学期12月月考数学试题河南省新乡市红旗区第一中学2023-2024学年九年级上学期期末数学试题河南省新乡市辉县市2023-2024学年九年级上学期期末数学试题江苏省南京市江宁区南京师范大学附属中学江宁分校2023-2024学年九年级下学期第一次月考数学试题四川省成都市成都金苹果锦城第一中学2023-2024学年九年级下学期3月月考数学试题2024年山东省枣庄市山亭区九年级中考一模数学模拟试题2024年河南省三门峡市中考一模数学试题2024年山东省聊城市冠县中考二模数学试题2024年湖南省长沙市天心区第十五中学中考模拟数学试题甘肃省平凉市庄浪县联盟校2023-2024学年九年级下学期4月期中考试数学试题
更新时间:2023-06-20 11:26:07
|
【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】如图,从空中
点测得两建筑物
,
底部的俯角分别为
和
.如果测得
与
之间的距离为
,且点
,
,
在同一直线上.(结果取整数)
![](https://img.xkw.com/dksih/QBM/2021/5/22/2726307744522240/2728800298811392/STEM/c32cffca-010e-4e23-8068-a55771096b32.png)
(I)求
点距地面的高度
的值;
(II)求建筑物
,
间的距离.
参考:
,
,
,
,
,
)
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8141d00b74eb4c50bf861e6ff0edf137.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/903c1bb6f9fe8f9b9710683a3e601452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b1051b65bc144f8e2393d8a5dc43ba3.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2021/5/22/2726307744522240/2728800298811392/STEM/c32cffca-010e-4e23-8068-a55771096b32.png)
(I)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(II)求建筑物
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
参考:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc714fe6656552ae227332550756a620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b8e784cfcf697083f5a1bef0baa7cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c8d86d304069fb4b15ca518ad55d25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d2082b0e4e457c2ea1e033d69d8b39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b15906c24c41d13588f3c4b5e19086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7664a5f9b61fd010eda340986ca34b47.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】某地夏季中午,当太阳移到屋顶上方偏南时,光线与地面成
角,房屋向南的窗户AB高
.现要在窗户外面的上方安装一个水平遮阳篷
(如图所示).要使太阳光线不能直接射入室内,遮阳篷AC的宽度至少为多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f31dae7586dbfef5de2b830bcbcffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2019/8/27/2277700057194496/2277988901699584/STEM/6dbf0e1017ad47bf8f315b3acfeaffd2.png?resizew=140)
您最近一年使用:0次