1 . 如图,坡角
的斜坡上有一棵垂直于水平地面的大树
,当太阳光线与水平线成
角沿斜坡照下时,在斜坡上的树影
长为4米,则大树
的高为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c9efd52ec4af254022b6e4418adb99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b342d5cb6dd1c84a82f6aca68ed829c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 位于深圳市罗湖区的梧桐山公园自西南向东北渐次崛起,分布着小梧桐、豆腐头、大梧桐三大主峰.从远处观看,山中最为瞩目的当属小梧桐电视塔.登临小梧桐山顶,可上九天邀月揽星,可鸟瞰深圳关内外壮丽美景.我校某数学兴趣小组的同学准备利用所学的三角函数知识估测该塔的高度,已知电视塔
位于坡度
的斜坡
上,测量员从斜坡底端
处往前沿水平方向走了
达到地面
处,此时测得电视塔
顶端
的仰角为
,电视塔底端
的仰角为
,已知
、
、
、
在同一平面内,则该塔
的高度为( )
,(结果保留整数,参考数据;
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e34b79c53d8ef007f19be2dda8ee641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26200dc5e0e1b1f84d1623cb36e828f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e6f107b79080fa968334b16fec1dd4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c030b25575d683af91c06e6a3e4f463.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/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5022abc6afd4deff13845419fa38312e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db72b701bf76a7130aee45f60ed6eaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460317e7c26f95b9b29cfe1a89b796d6.png)
A.24 | B.31 | C.60 | D.136 |
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3 . 甲、乙两人去登山,甲从小山西边山脚
处出发,已知西面山坡的坡角为
.同时,乙从东边山脚
处出发,东面山坡的坡度
,坡面
米.求甲、乙两人出发时的水平距离
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2450156c6f081864f1efcf10af156e47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e7dccc5222820f20ddf2d3561bb1993.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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4 . 如图① ,扬中塔(英语:
)又称扬中新广播电视发射塔,昵称扬中小蛮腰.位于扬中市滨江公园内,距离市区
,与镇江新区隔江相望,是扬中热门景点之一.
建在背水坡坡比为
,坡长
米,塔底B 距离C点10米的环岛江堤上,小明在距离D点275米的E处测得塔顶A的仰角为
,已知堤坝顶部
与地面
平行,求扬中塔
的高度(参考数据
,结果保留整数).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b96fe1c5290213aae82d47133e073b79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5656eaa3a8b00e2b10efe32eb537d5a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda42c22a8bace7f0c4a7d8e220592eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8a7ff6bb8000946da9599d7d903ac9a.png)
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5 . 某数学小组在刘老师的指导下测量一建筑物高度,活动报告如下:
请结合以上信息完成步骤四:计算建筑物
的高度.(参考数据:
,
)
活动报告 | ||
活动目的 | 测量建筑物的高度 | |
活 动 过 程 | 步骤一:设计测量方案(小组讨论后,画出如图的测量示意图) | |
步骤二:准备测量工具 | 皮尺、测倾器 | |
步骤三:实地测量并记录数据(A,B,C,D在同一平面上,![]() | ①建筑物![]() ![]() ![]() ![]() ②在斜坡 ![]() ![]() ③斜坡 ![]() ④在点B测得建筑物顶点C的仰角为 ![]() | |
步骤四:计算建筑物![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7664a5f9b61fd010eda340986ca34b47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b519e336bb6346496d4c99a5a7a7e07b.png)
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6 . 位于海南临高县城西北部3.6公里处的高山岭,古称毗耶山,海拔高193米,是省级自然保护区.岭上有神石、神湖、怪石、瞭望塔和奇花异草.某数学学习小组的同学来到高山岭脚下,测量瞭望塔
的高度.如图,小颖同学在坡底C处测得瞭望塔顶端A的仰角为
,小颖沿坡面
前行
到达D处,测得瞭望塔顶端A的仰角为
.
的坡角
,坡度等于 ;
(2)求D处到
的距离;
(3)求瞭望塔
的高度.(结果精确到
,参考数据:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/253a137441744700dcb8cb5d916b6662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26200dc5e0e1b1f84d1623cb36e828f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad1b0a76a887783392268ae203ad22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2478f34a040b58a46321fbcaf20a9ee.png)
(2)求D处到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(3)求瞭望塔
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b249c222293a0df29234b4e983ceb11c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c894b7d6baa55c80c64e74748dad898.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460317e7c26f95b9b29cfe1a89b796d6.png)
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7 . 如图,为了测量小河对岸一座小山
的高度,某测绘小组先在斜坡上的
处,测得小山顶端
的仰角为
,且
离地面的高度
.斜坡
的坡度
(坡面的垂直高度
和水平宽度
的比叫做坡度(或叫做坡比)用字母
表示),然后在
处测得小山顶端
的仰角是
,点
在同一水平线上.
,
;
(2)求点
到点
的距离(结果保留根号);
(3)求小山
的高(结果保留根号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/9d3ec68a9810c8b898cdbbb7a273b057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcca115f36666388c3afedb11b4db25d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9017f10a44a1a9433ac0b39945137507.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.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/e13b121a371524ec93dec325c5b0fe69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cbafd6378e70bc9b2df52ed82f6416e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4db07c6ce6c8b0e96a3470c6a3491334.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3c3c112368d374afe3c2f8a4a1ce29c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32217457c4e96e2ef155cf15c1b65d97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5022abc6afd4deff13845419fa38312e.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(3)求小山
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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8 . 如图,兰兰欲测量广场上某旗杆
的高度,她在该旗杆正前方的石坡顶
点处测得旗杆顶端
的仰角为
,在坡脚
点处测得旗杆顶端
的仰角为
,已知石坡高为3米,坡度
,求旗杆
的高度(其中点
在同一直线上).(结果精确到1米,
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.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/efad20bd46a617d5eaf425eefa59f95f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2450156c6f081864f1efcf10af156e47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b8e238bec187c119aee3c485958aad8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba6f1168fac3f013f14c3f1f30beacb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53027653e1c5530f2021728d4b82451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1acf457346c1f4e88d96493abd4dba.png)
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9 . 如图,已知传送带
与地面
所成斜面坡度为
,如果它把物体送到离地面3米高的地方,那么物体在传送带上所经过的路程为__________ 米(结果保留根号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09824eebae0979a2b6b1fcc4d04bdee.png)
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10 . 如图,已知斜坡
长为
,坡角(即
)为
,
,现计划在斜坡中点
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
.若修建的斜坡
的坡角为
,则平台
的长为__________
.(参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16031d843863bfef706632beaf7ad77d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d900531973c546625694146fa1509ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e00f40396e914d1d9955bd7785f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47bb3f35e3db7c1f3a3dd3eb20151b5f.png)
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