1 . 如图,某数学活动小组为测量学校旗杆
的高度,沿旗杆正前方
米处的点
出发,沿斜面坡度
的斜坡
前进
米到达点
,在点
处安置测角仪,测得旗杆顶部
的仰角为
,量得仪器的高
为
米,已知
、
、
、
、
在同平面内,
,则旗杆
的高度是_______ 米.(参考数据:
,计算结果精确到
米)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df98c7b41e565f2f1f0b36fb98cfe3bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e6f107b79080fa968334b16fec1dd4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/742145c3bfb5281e2e583e6405a3d4ee.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/5885aa4ddc3e5f03c708ea3afc84804b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58e820c2fae5df321a15a0478a70a4c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2466cd4f7db939faf82172df7040b16a.png)
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2 . 小明同学上周末对公园钟楼
的高度进行了测量,如图,他站在点
处测得钟楼顶部点
的仰角为
,然后他从点
沿着坡度为
的斜坡
方向走
米到达点
,此时测得建筑物顶部点
的仰角为
已知该同学的视线距地面高度为
米
即
米
,图中所有的点均在同一平面内,点
、
、
在同一条直线上,点
、
、
在同一条直线上,
、
、
均垂直于
则钟楼
的高约为多少米?
精确到
参考数据:
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d4c3ad0b10e4b0cd90661a8e127037.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3abf47a30522d888afdee3061272863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c2835f13ee9f6a1a5fd53137d0f1a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a32a2355d81cb016521c1a5d55e9d8b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7f27ebcef70a3ebbbe8d2e53ea0896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c912338d075687e498fe0ae6dfb52c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f0ef824845a450279d4af3b998b95c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0d738c072507593fb58bfe7a0049f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.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/895dc3dc3a6606ff487a4c4863e18509.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3129010c2d93f4d2168cf0d1c63e957b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4087fe637f2f1a5579085272e736c9f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/629412c3184e06cd1e9a87008d7b6974.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8ecc8a8ce0465a731c9a57849ab9cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d4c3ad0b10e4b0cd90661a8e127037.png)
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3 . 某班两个兴趣小组计划合作测量校园内一斜坡(坡度为
)旁路灯的高度,分工如下:
小组甲:测量竹竿
的长度,并将该竹竿竖立在地面上,测量其在地面上的影长
.
小组乙:在同一时刻,测量路灯
在斜坡上的影长
,及路灯与斜坡底端的距离
.测量示意图和测量数据如下:
请你根据以上信息计算路灯
的高度.(结果保留整数,参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db20862b954cd1886f4765657a46d91c.png)
小组甲:测量竹竿
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
小组乙:在同一时刻,测量路灯
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
请你根据以上信息计算路灯
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8a7ff6bb8000946da9599d7d903ac9a.png)
小组 | 甲 | 乙 |
图示 |
|
![]() ![]() ![]() ![]() |
测量数据 | ![]() ![]() | ![]() ![]() |
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4 . 为测量某建筑物
的高度,在坡脚A处测得顶端C的仰角
为
,沿着倾斜角
为
的斜坡
前行
到达D处,此时测得顶端C的仰角
为
,求建筑物
的高度.(参考数据:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19cd1b3f46f0538d8e9d8674dbbb9110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/838f2c55aa62ade41ff05744a4faaddb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4189a0821a0ffab9dc171ecd279ba442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48cf21017ebe712348fbe500113dbc59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1611d15c7e1e4ab4a4a61537b3989d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d19f963f7c803bcfcbb265ec6d4304.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db4f0391c6406ff2da3c1f8d0ca5dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19cd1b3f46f0538d8e9d8674dbbb9110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/838f2c55aa62ade41ff05744a4faaddb.png)
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5 . 某同学利用数学知识测量建筑物
的高度,他从点
出发沿着坡度为
的斜坡
步行
米到达点
处,用测角仪测得建筑物顶端
的仰角为
,建筑物底端
的俯角为
.若
为水平的地面,点
在同一平面内,建筑物
和测角仪
与水平方向垂直,若
米,则此建筑物的高度
约为( )(精确到
米,参考数据:
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81ae941c9aef1c8186fe2518389df339.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5453184e251cfe787b5965cd38426962.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/5a3fefe07cbda3517e88b226d557dc2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07705aa6a35111c4f99f4726dedf0f22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1258b3cc1a5b98a4f5cd9a80b181e941.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a87796ee30e6c5d5e6b6285b32abe10c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77ac286aaabaf423a8bdc5b008dcf567.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f3276a6fe4d3e8fc86c7b96b5e1aa7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54498fde8e57d82ffeef09a2979eca1c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 郑州市政府坚持以人民为中心的发展思想和“人民至上、生命至上”理念,未雨绸缪好过亡羊补牢,对京广路隧道考虑增加多种安全措施,排除安全隐患.根据各段隧道空间情况,在不影响交通的情况下,加装了大小、形状不一的19条人行逃生爬梯.如图1,起初工程师计划修建一段坡角为50°(即
,
)的爬梯
,从安全角度再次考虑,工程师对爬梯的设计进行了修改,如图2,修建了
、
两段平行的爬梯,并在中间修建了1米的水平平台
,点C、B、F三点共线,小明实地测量后得到
为4米,
为5米.
(2)求修改后爬梯的底部F与修改前爬梯的底部B之间的距离.(结果精确到0.1米.参考数据:
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c50139f281e4d1a6d1dcb4f4327d7b2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10ad623f3a05ecdc27b3f3e0169669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
(2)求修改后爬梯的底部F与修改前爬梯的底部B之间的距离.(结果精确到0.1米.参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f62c566ec23538028e708fe04543c5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a455e37d7005c97b7e2655312f45a4b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7379d1eed8fa2f116f84fe4f2874fb1c.png)
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7 . 如图,某登山队在攀登一座坡角为
的山,每爬上一段山坡就会插一根标杆作为标记,每相邻两根标杆之间的水平距离为80米,那么这两根标杆在坡面上的距离
为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1845ed03ec08feac9adee161aab3449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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8 . 五峰山长江大桥是连镇高铁跨越长江的公铁两用悬索桥.已知塔旁边有一个坡角为
的山坡
,长80米,坡顶有一个水平平台
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
,小明在平台上距离C点21米的D点处测得塔顶端A的仰角为
,求主塔
的高度(结果精确到1米).参考数据:
,
,
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b431554d1e695417929d042dcf51269b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f39adb89110f86f5abdb06a6c9489c75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460317e7c26f95b9b29cfe1a89b796d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcae06ecce74f9f183add82a23e00349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37185e91d0b9062842edd180d47df1b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06c374b2778a6ab9291ed53134cac209.png)
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名校
9 . 小杰沿着坡比
的斜坡,从坡底向上步行了
米,那么他上升的高度是______ 米.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1852175af2bff405159bc6b574dcb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/110e329d74716ab387dc602bb2b4f998.png)
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10 . 在建筑楼梯时,设计者要考虑楼梯的安全程度,如图①,虚线为楼梯的斜度线,斜度线与地板的夹角为倾角
,一般情况下,倾角
愈小,楼梯的安全程度愈高.如图②,设计者为提高楼梯的安全程度,要把楼梯的倾角由
减至
,这样楼梯占用地板的长度由
增加到
,已知
,求楼梯占用地板的长度增加了多少?(
,精确到
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f64fa38725c136504f723019a18dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e93fa313adc4ac7608ba9449fd755212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edf900c810371fb21297c15f86d8743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31ac1def558351e2e3ed1235c570530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5846c12a55298209174c5d22bd97938.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b5bbe46a6f390ada0ce698a45322c67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfaa19eeaf415ed419e77fe92794f443.png)
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