名校
1 . 如图,坡
的坡度为
,坡面长26米,
,现计划在斜坡中点D处挖去部分坡体(用阴影表示)修建一个平行于水平线
的平台
和一条新的斜坡
(请将下面两小题的结果都精确到
米,参考数据:
).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/20/aa6952f2-17b8-4a5d-9fde-5b5ad22e5976.png?resizew=268)
(1)若修建的斜坡
的坡角(即
)恰为
,则此时平台
的长为多少米?
(2)坡前有一建筑物
,小明在D点测得建筑物顶部H的仰角为30°,在坡底A点测得建筑物顶部H的仰角为60°,点B、C、A、G、H在同一平面内,点C、A、G在同一条水平直线上,问建筑物
高为多少米?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f506e1c5584ae3c4d287c49f75a752dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d900531973c546625694146fa1509ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a87796ee30e6c5d5e6b6285b32abe10c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47bb3f35e3db7c1f3a3dd3eb20151b5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/20/aa6952f2-17b8-4a5d-9fde-5b5ad22e5976.png?resizew=268)
(1)若修建的斜坡
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2ee75a234ac05a3225e49ddd8c5065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(2)坡前有一建筑物
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
您最近一年使用:0次
2023-02-18更新
|
574次组卷
|
13卷引用:2020年安徽省马鞍山市中考数学二模试题
2020年安徽省马鞍山市中考数学二模试题2022学年安徽省合肥市蜀山区五十中新校中考二模数学试卷2022年安徽省合肥市五十中新校中考数学二模试卷(已下线)28.2.2 解直角三角形的应用(分层练习)-2022-2023学年九年级数学下册同步精品课堂(人教版)(已下线)锐角三角函数学科特色山东省日照市北京路中学2022-2023学年九年级上学期期末数学试题山东省日照市日照港中学等四校2022-2023学年九年级上学期期末数学试题(已下线)数学(湖南株洲卷)-学易金卷:2023年中考第一次模拟考试卷2023年重庆市合川区合阳中学中考一模数学试题(已下线)2023年山东省济南市长清区东城校际联合体中考二模数学试题变式题21-26题重庆市凤鸣山中学集团校2023-2024学年九年级上学期10月月考数学试题重庆市沙坪坝区部分学校2023-2024学年九年级上学期10月月考数学试题2024年重庆两江新区星海学校适应性考试数学模拟预测题
名校
2 . 如图所示,为学校旁边一座小山的截面图.已知
是水平线,经测量
米,
、
、
是斜坡,斜坡
的坡角为
,坡长为
米,
,斜坡
的坡比为
,过点
作
垂足为
.(参考数据:
)
![](https://img.xkw.com/dksih/QBM/2023/1/14/3152509642620928/3154188763488256/STEM/bb4ef54cc80341058b457bed2a8bbae6.png?resizew=283)
(1)求坡顶
到水平线
的距离;
(2)某徒步爱好者小明沿着这个截面按照
的路线走完全程,求小明所走的总路程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f770e364a3d4df0b01fe0fbe1ca08e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e6f107b79080fa968334b16fec1dd4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbe4f94267b50d14c8ea499660c2bcc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50070338485265d4833a6a5738b36b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4dd80daefa23a61d300a829f77bbfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7286c442984e33bb52eada93d71c4128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e68e9dc8f4c97e483d4e01994c34e06.png)
![](https://img.xkw.com/dksih/QBM/2023/1/14/3152509642620928/3154188763488256/STEM/bb4ef54cc80341058b457bed2a8bbae6.png?resizew=283)
(1)求坡顶
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
(2)某徒步爱好者小明沿着这个截面按照
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4e628bb5e70e75cc8c35babea305b9.png)
您最近一年使用:0次
3 . 如图,小明为了测量小河对岸大树
的高度,他在点A处(点G、A、C在同一水平线上)测得大树顶端B的仰角为
,沿着坡度
的斜坡
走6米到达斜坡上点D处,此时测得大树顶端B的仰角为
,点A、B、C、D在同一平面内.
(1)填空:
,
;
(2)求斜坡上点D到
的距离;
(3)求大树
的高度(结果精确到0.1米.参考数据:
,
,
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df98c7b41e565f2f1f0b36fb98cfe3bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7451b9d94e28503b8ac931632ff9dbf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/29/86a54bd8-04d4-441d-9884-7cbe07df0366.png?resizew=230)
(1)填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeb5b319c717586a3ad3d39c873d69bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acb663fe83b1f7e93e13d91cc6460f9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(2)求斜坡上点D到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
(3)求大树
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9276f5c80582d75a9731f68947c5d08f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a91fa163ba018df2dcf31e86f10180.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c114c8734f0d064de64d8457655a980c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460317e7c26f95b9b29cfe1a89b796d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c894b7d6baa55c80c64e74748dad898.png)
您最近一年使用:0次
2023-05-15更新
|
589次组卷
|
5卷引用:2023年海南省海口市中考一模数学试题
2023年海南省海口市中考一模数学试题(已下线)2023年浙江省嘉兴(舟山)市中考数学真题变式题21-24题四川省泸州市合江县教育发展研究中心2023-2024学年九年级上学期期末数学试题安徽省 六安市 舒城县2023-2024学年九年级上学期期末数学试题江苏省常州市新北区河海实验学校2023-2024学年九年级上学期第二次月考数学试题
4 . 图(1)为某大型商场的自动扶梯,图(2)中的
为从一楼到二楼的扶梯的侧面示意图.小明站在扶梯起点A处时,测得天花板上日光灯C的仰角为
,此时他的眼睛D与地面的距离
,之后他沿一楼扶梯到达顶端B后又沿
(
)向正前方走了
,发现日光灯C刚好在他的正上方.已知自动扶梯
的坡度为
,
的长度是
.
(参考数据:
,
,
)
的距离;
(2)求日光灯C到一楼地面
的距离.(结果保留整数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8141d00b74eb4c50bf861e6ff0edf137.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2948d2c3e3dcee00bd0ddb27242c0224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97607f6947b43d1847bb9db1b1c59615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/697531bbefe4f72de572c7c8ef20b30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f71a41641aa0d0e45a3c03d3d2c1196b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f506e1c5584ae3c4d287c49f75a752dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e685c2fe2f54fa7947538472cd7caa9.png)
(参考数据:
![](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/8d0062f4f00732a0cf11d1ac145c218b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)求日光灯C到一楼地面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
2024-03-28更新
|
504次组卷
|
4卷引用:2024年辽宁省鞍山立山区九年级三模数学模拟试题
2024年辽宁省鞍山立山区九年级三模数学模拟试题2024年四川省广安市广安友实学校中考数学模拟预测题3(已下线)抢分通关07 锐角三角函数解决实际问题(2易错7题型)-备战2024年中考数学抢分秘籍(全国通用)2024年山东省菏泽市单县中考三模数学试题
名校
5 . 为了方便市民出行,建委决定对某街道一条斜坡进行改造,计划将原斜坡坡角为
的
改造为坡角为
的
,已知
米,点
,
,
,
,
,
在同一平面内.
的距离;(结果保留根号)
(2)一辆货车沿斜坡从
处行驶到
处,货车的高
为
米,
,若
米,求此时货车顶端
到水平线
的距离
.(精确到
米,参考数据:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b342d5cb6dd1c84a82f6aca68ed829c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c030b25575d683af91c06e6a3e4f463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31002898d491f5a970394ee1356c3dea.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)一辆货车沿斜坡从
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de4a54cc7818be87a239f6de5f5d05b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/040dbb21acfecb924ba08d1469dc5e98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2466cd4f7db939faf82172df7040b16a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c894b7d6baa55c80c64e74748dad898.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460317e7c26f95b9b29cfe1a89b796d6.png)
您最近一年使用:0次
2023-12-11更新
|
514次组卷
|
4卷引用:重庆市第一中学校2023-2024学年九年级上学期期中数学试题
重庆市第一中学校2023-2024学年九年级上学期期中数学试题湖南省衡阳市衡山县 2023-2024学年九年级上学期期末数学试题(已下线)九年级数学开学摸底考(重庆专用,中考范围)-2023-2024学年初中下学期开学摸底考试卷(已下线)中考重点04 三角函数实际问题(4题型+满分技巧+限时检测)-2024年中考数学【热点·重点·难点】专练(重庆专用)
名校
6 . 如图,在河流两边有甲、乙两座山,现在从甲山
处的位置向乙山
处拉电线.已知甲山上
点到河边
的距离
米,点
到
的垂直高度为120米;乙山
的坡比为
,乙山上
点到河边
的距离
米,从
处看
处的俯角为25°(参考值:
,
,
)
处到河边
的垂直距离;
(2)求河
的宽度.(结果保留整数)
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cf7051225f4a5580e51a67309401579.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff51cfdf99a6f1000b0878a6588f5dc.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/ddb687d8242a3d1a64a2fc63d8673720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2580c40edce72a9c109cdabd9274e57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f50fc45180528ce528de5525f49e3a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d325a20e4addfff7dc4d50e5a9ca97a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)求河
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
2023-03-06更新
|
573次组卷
|
9卷引用:重庆西南大学附属中学校2022-2023学年九年级上学期开学数学测试题
重庆西南大学附属中学校2022-2023学年九年级上学期开学数学测试题江苏省苏州市姑苏区振华中学校2022-2023学年九年级下学期3月月考数学试题浙江省金华市婺城区第九中学2022-2023学年九年级下学期2月月考数学试题湖南省岳阳市通海路中学金凤桥校区2023-2024学年九年级上学期第三次月考数学试题(已下线)专题03 三角函数实际应用(四大类型)(题型专练)-2023-2024学年九年级数学下册《知识解读·题型专练》(人教版)(已下线)专题03 三角函数实际应用(四大类型)(题型专练)-2023-2024学年九年级数学下册《知识解读·题型专练》(北师大版)(已下线)专题03 三角函数实际应用(四大类型)(题型专练)-2023-2024学年九年级数学下册《知识解读·题型专练》(苏科版)(已下线)专题03 三角函数实际应用(四大类型)(题型专练)-2023-2024学年九年级数学下册《知识解读·题型专练》(浙教版)2024年辽宁省初中学业水平模拟考试(四) 数学模拟预测题
7 . 如图,楼房
后有一假山
,
的坡度为
,测得
与
的距离为
米,山坡坡面上
点处有一休息亭,与山脚
的距离
米,小丽从楼房房顶
处测得
的俯角为
.
(1)求点
到水平地面的距离;
(2)求楼房
的高.
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2450156c6f081864f1efcf10af156e47.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/51ed533272ac9d01f1ce3e741b034d4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/052d471177df219bfec13448f539f19c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/20/e764e659-dfdc-49c3-985e-8fa454e081fc.png?resizew=204)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)求楼房
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2023-11-17更新
|
491次组卷
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4卷引用:河北省 邢台市信都区皇台底中学2023-2024学年九年级上学期期中数学试题
真题
名校
8 . 如图,在某信号塔
的正前方有一斜坡
,坡角
,斜坡的顶端C与塔底B的距离
米,小明在斜坡上的点E处测得塔顶A的仰角
米,且
(点
在同一平面内).
_______度,
______度;
(2)求信号塔的高度
(结果保留根号).
![](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/da9cfde08128d85bbd97bf3bbb5ff800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90644ea4b9887bc743ab3831550343b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4a777df9ba80c737404f1f22da17fa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a452e4447e64b82d6352a2a7234f0afc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/967a1c427bfb4d6aa27c331c84d88ef1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94c44345de7d1f37b48def25db8c5e2b.png)
(2)求信号塔的高度
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2021-06-28更新
|
1810次组卷
|
11卷引用:海南省2021年中考数学真题试卷
海南省2021年中考数学真题试卷(已下线)专题08 锐角三角函数的实际应用-备战2022年中考数学母题题源解密(河南专用)(已下线)2021年天津市中考真题数学变式汇编5(已下线)海南省2021年中考数学真题变式汇编52022年贵州省贵阳市中考数学模拟题(二)江苏省宿迁市沭阳县怀文中学2021-2022学年九年级下学期第一次月考数学试题辽宁省鞍山市海城市孤山镇初级中学2022-2023学年九年级下学期4月月考数学试题辽宁省鞍山市岫岩满族自治县2022-2023学年九年级下学期4月月考数学试题2023年广东省揭阳市惠来县明德中学中考一模数学试题2023年广东省广州市天河区大华学校中考一模数学试题2024年黑龙江省绥化市绥棱县克音河乡学校中考一模数学试题
名校
9 . 如图是一座人行天桥的示意图,已知天桥的高度
米,坡面
的倾斜角
,距B点8米处有一建筑物
,为了方便行人推自行车过天桥,市政府决定降低坡面
的坡度,把倾斜角由
减至
,即使得新坡面
的倾斜角为
.若新坡面底端A处与建筑物
之间需要留下至少3米宽的人行道,那么该建筑物是否需要拆除?请说明理由.(结果精确到0.1米;参考数据:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dc7f54acef4e40aad465ffe5f8b4b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d567bdeba9b8e17d0911f594e141eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d65639672f444b3d4dc6fc4f357ddbd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d567bdeba9b8e17d0911f594e141eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6347d7febfaba339b80510b55c5e91b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460317e7c26f95b9b29cfe1a89b796d6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/13/341e5525-5577-4d56-90cb-d80236f8abb3.png?resizew=243)
您最近一年使用:0次
2023-05-10更新
|
590次组卷
|
7卷引用:2023年四川省成都市蒲江县中考二模数学试题
2023年四川省成都市蒲江县中考二模数学试题泸科版九年级上册第23章解直角三角形单元测试数学试题2023年四川省成都市邛崃市中考二模数学试题2023年广东省广州市执信中学中考二模数学试题2023年广东省广州市执信中学中考三模数学试题(已下线)专题03 三角函数实际应用(四大类型)(题型专练)-2023-2024学年九年级数学下册《知识解读·题型专练》(人教版)(已下线)专题03 三角函数实际应用(四大类型)(题型专练)-2023-2024学年九年级数学下册《知识解读·题型专练》(北师大版)
10 . 如图,旗杆
上有一面宽为
的旗子.
在同一水平线上,小明在距旗杆
m的点
处测得点
的仰角为
,随后小明沿坡角(
)为
的斜坡走了
m到达点
处,测得点
的仰角为
.
的长;
(2)求旗面宽
的长度(参考数据:
,结果精确到
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9909276965b7e30b049baf8b7685a39b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/903c1bb6f9fe8f9b9710683a3e601452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c962fe4f47732b8e6e83d17ff2b9af13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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/49b50357a6545cae8348e3059312f520.png)
(2)求旗面宽
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/115586e74a8d656d43edbf707a095c70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfaa19eeaf415ed419e77fe92794f443.png)
您最近一年使用:0次