1 . 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.![]() |
您最近一年使用:0次
2 . 万州二中教育集团数学爱好者小艺为测量教学楼对面的大楼
的高度,她先到达教学楼
顶部的休闲区点
的位置,看到对面大楼
顶端的视线与水平线的夹角为
,然后沿长
米、坡度为
:
的斜坡
到达斜坡顶端,再向前走
米到达教学最边缘的观测点
处,看到对面大楼
底端的视线与水平线的夹角为
,已知大楼底部和教学楼底部在同一水平面上,目高
米,教学楼
高为
米
(参考数据:
,
,
)
与对面大楼
的水平距离
的长;
(2)求对面大楼
的高.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/158f2c27f9440c2f2adf5d33dd157cbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8f58755aee89fb2cf72ba518dcee2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e1d0f65817ba32a732040518f41440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/633860f915e1db28814fff86584cc93e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bd593d5943aead0571c18123217c268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/040b1515a26c128996e18619faa9ce36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
(2)求对面大楼
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2024-04-03更新
|
161次组卷
|
2卷引用:2023年重庆市万州二中教研片区中考数学联考模拟预测题
3 . 如图,重庆市实验中学校为了丰富同学们的课外实践活动,组织科技爱好者在斜坡A地进行无人机试飞.张明的无人机放飞到距离地面
米的P点,测得斜坡A地的俯角为15°,斜坡B地的俯角为60°,斜坡
的斜面坡度为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/34dc7517-d65a-4c5e-918e-ea5bf3b8ecba.png?resizew=222)
(1)求斜坡A地到B地的距离;
(2)下课前,老师要求同学们在A地集合,张明对无人机P发出回收指令以后,然后他迅速从山脚的C地跑回到A地,已知斜坡AC与水平地面夹角为53°,张明上坡的跑步速度为6m/s,无人机的速度为20m/s,在张明跑到A地时,无人机是否已经回到A地?请说明理由.(
,
,
,
,
,结果精确到0.1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6010598e7bbdd27219819ac92c74c2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db20862b954cd1886f4765657a46d91c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/34dc7517-d65a-4c5e-918e-ea5bf3b8ecba.png?resizew=222)
(1)求斜坡A地到B地的距离;
(2)下课前,老师要求同学们在A地集合,张明对无人机P发出回收指令以后,然后他迅速从山脚的C地跑回到A地,已知斜坡AC与水平地面夹角为53°,张明上坡的跑步速度为6m/s,无人机的速度为20m/s,在张明跑到A地时,无人机是否已经回到A地?请说明理由.(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52881be613aa404e553da30d8987cfad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47bb3f35e3db7c1f3a3dd3eb20151b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/888e6e9e6ca20554cc98547b1a3f8bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04390bfdcc0c4707fd43a2c0b6a585f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ab9ef8b634c2a582a9b1fb20fdd3a0c.png)
您最近一年使用:0次
2024-04-01更新
|
200次组卷
|
2卷引用:重庆市巴南区龙洲湾中学、巴南区实验中学、全善学校2023-2024学年九年级下学期3月月考数学试题
4 . 除夕夜小李和亮亮相约去看烟花,并测量烟花的燃放高度.如图,小李从点B处出发,沿坡度为
的山坡
走了
到达坡顶点A处,亮亮则到达离点A水平距离为
的点C处观看,此时烟花在与B,C同一水平线上的点D处点燃,一朵朵灿烂的烟花在点D的正上方点E处绽放,小李在坡顶A处看烟花绽放处E的仰角为
,亮亮在C处测得点E的仰角为
.(点A,B,C,D,E在同一平面内;参考数据:
,
)
(2)烟花燃放结束后,小李和亮亮来到烟花燃放地帮忙清理现场的垃圾,他们清理时发现说明书上写着烟花的燃放高度为
,请你帮他们计算一下,说明书上写的烟花燃放高度与实际燃放高度(图中
)是否相符?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4dd80daefa23a61d300a829f77bbfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2e02621fbb924cfece5d16038f558f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49ec72d07385ed62ec9540083958be2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52881be613aa404e553da30d8987cfad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47bb3f35e3db7c1f3a3dd3eb20151b5f.png)
(2)烟花燃放结束后,小李和亮亮来到烟花燃放地帮忙清理现场的垃圾,他们清理时发现说明书上写着烟花的燃放高度为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/763579e0339bcd9bcd374807fd34a098.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
您最近一年使用:0次
2024-03-31更新
|
246次组卷
|
2卷引用:2024年重庆中考数学模拟试题(二)
5 . 某商业区为了提升地下停车库入口的安全性能,拟将坡比为
的斜坡
改造成斜坡
,使得
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/31/5ce11ccf-4426-4884-a481-f92ce6fe2bf4.png?resizew=142)
(1)若
,求斜坡底部增加的长度
为多少米?(结果确到0.1米)
(2)入口处水平线
,且
,地下停车库坡道入口上方点E处有悬挂广告牌
,
,
.若一辆满载货物高为
的货车沿斜坡
驶入车库,行进中是否会碰到广告牌的下端F?请说明理由.(参考数据:
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e76213e9474cc6f549a94344fd25f27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5a9665292709e24361204163c64fd15.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/31/5ce11ccf-4426-4884-a481-f92ce6fe2bf4.png?resizew=142)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2234704a19451635fea5e72c78f81d00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
(2)入口处水平线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77f6e60f4598a81f2a26ff28b1bff66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/626270ae36efe23a40736897cc10645b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f59d528bf5ee8f3e1d93645bb2c48b7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4161ff9e22661ae123f4b6defe389131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f262271bb023018c6f14833f955e157.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ec99c956b417f7b4f82c65c31d4183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b1022757dc1d4ae8d4d19c5ccb43f1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/391bb649bf021d732dfe642b3c5c8c5a.png)
您最近一年使用:0次
2024-03-29更新
|
118次组卷
|
3卷引用:重庆市高新区2023-2024学年九年级下学期第一次月考数学试题
名校
6 . 如图,小李为了测量某居民楼
的高度,在楼底端点
沿斜坡
走36米到达点
,已知斜坡
与地面夹角为
,再沿水平方向走6米就到达到达点
,然后他沿着坡度
的斜坡
走了52米到达了点
,此时他在点
处放置了高度为1.6米的测角仪
,在点
处测得某楼顶端
点的仰角
.(参考数据:
)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/25/0b31c80a-9b80-410a-94e1-7bf37aa1ae00.png?resizew=227)
(1)求居民楼
的高度约为多少米;
(2)如图,在
处的小李与在
处的小明约好在
中点
处见面,已知两人的下坡速度都为
,平地速度为
,居民楼
的电梯运行速度是
,不考虑电梯的等待时间和中途进出时间,那么谁会先到达
?请说明理由.(精确到0.1米)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1852175af2bff405159bc6b574dcb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.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/3ccc30d7dcade65397851643a607388c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ab054cc773d26e20cb8003427791.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/25/0b31c80a-9b80-410a-94e1-7bf37aa1ae00.png?resizew=227)
(1)求居民楼
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)如图,在
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8cb59de76dadcd5edba0d742fd5d5c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6196cf17c17eb7b94ef4b963942a0680.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ecd75424b351d8ecf2a311c525c77ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
7 . “养生黑山谷,梦幻奥陶纪”,闻名遐迩的奥陶纪悬崖大秋千惊险刺激,颇受年轻人追捧.下图是其简化截面图,线段
是其主支柱,垂直于地面
.游客体验该项目时,机械装置将21米的摆臂
拉至主支柱左侧,将其释放,摆动到主支柱右侧FH处,摆动过程中,摆臂保持笔直.平台
下悬崖高度(点M与悬崖底部水平面距离)约为280米.
某日小明去体验此项目,他先从A出发沿坡度
的斜坡
向上2.5米到平台
上的B点,然后水平向右2米到达点C的位置,此时看向支柱顶点F的仰角为
,已知
米,小明眼睛与平台的距离
米,(参考数据:
,
,
,
,
)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/22/e5ed89a2-2946-4848-9f84-db612357c51d.png?resizew=287)
(1)请计算主支柱
的高度(结果保留整数).
(2)由于高空项目风险大,为保障安全,国家制定了相关规定,高空秋千项目属于大型游乐设备,最大单侧摆角(摆臂与主支柱夹角)不超过75度,同时,运营方将秋千坐人端在运行路线上的平均速度定为不超过20米/秒时为安全可控,体验该项目时,若小明从与支柱夹角为
的
位置运行到在支柱另一侧夹角为
的
位置所用时间为3秒,请判断小明的平均速度是否安全可控且说明理由,并计算出此时H点与悬崖底部水平面的垂直高度(结果保留整数).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ac28c7adade476df476c2bf90a8416.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e4c6b0869d7248b6c2f964718a67702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
某日小明去体验此项目,他先从A出发沿坡度
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c43e3b52734884adbf317d41e005c6e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16aa0b9869db50a9ab48cc32925d8e96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e089bfa1e46b2446cb6dac6882febe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2299a444dcfb9133f6a82a028b1c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d988a20eddaaa07b17f15b652e16391.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c40de1af73c4fdbd42edf38d0f143b80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2433da66580064b5367339e715c898e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a205a05ab52c221246b224c104d3764.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f13a78a5feb056770750c6a0ebebdd2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/22/e5ed89a2-2946-4848-9f84-db612357c51d.png?resizew=287)
(1)请计算主支柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ac28c7adade476df476c2bf90a8416.png)
(2)由于高空项目风险大,为保障安全,国家制定了相关规定,高空秋千项目属于大型游乐设备,最大单侧摆角(摆臂与主支柱夹角)不超过75度,同时,运营方将秋千坐人端在运行路线上的平均速度定为不超过20米/秒时为安全可控,体验该项目时,若小明从与支柱夹角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a4c9b697e3df2b5469b71d3b5e47a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a4c9b697e3df2b5469b71d3b5e47a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
您最近一年使用:0次
8 . 综合与实践活动中,要利用测角仪测量塔的高度,如图,塔
前有一座高为
的观景台,已知
,
的坡度为
,点E,C,A在同一条水平直线上.某学习小组在观景台C处测得塔顶部B的仰角为
,在观景台D处测得塔顶部B的仰角为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/17/17948576-284e-4f20-9edb-94fc99cd88ec.png?resizew=252)
(1)求
的长;
(2)求塔
的高度.(结果保留个位)
(参考数据:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4866e219791f0c6d9f6fb31b4bd97f69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df98c7b41e565f2f1f0b36fb98cfe3bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6660718078b93a4b14fde0a83970758c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/17/17948576-284e-4f20-9edb-94fc99cd88ec.png?resizew=252)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(2)求塔
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f908d4b655c081176a5a78c4372f9be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9f4ca4ac8a19cde8a76f21d24f3dbcb.png)
您最近一年使用:0次
2024-01-21更新
|
257次组卷
|
4卷引用:重庆市南岸区2023-2024学年九年级上学期期末数学试题
名校
9 . 我市为满足广大市民的锻炼需求,拟将郊区的一座山打造为健身公园,山体的横截面示意图如图1,计划修建两段登山步道
、
和两段平台
、
.其中,平台
、
均与水平地面
平行,平台
长75米,在点
处观察点
的仰角为
(即
),步道
的坡角为
,平台
距离地面
的竖直高度为900米,步道
的坡度
.(参考数据:
,
,
,
)
的长度;
(2)为方便市民徒步登山,市规划局预备将步道
全部修建成石梯,石梯的修建方式及尺寸(包括踏步高和踏步宽)均如图2所示.每一步石梯的安全标准是踏步高不小于
,不大于
,且踏步宽不小于
,不大于
.若计划修建3600个相同尺寸的连续石梯,请你通过计算说明这样修建的石梯是否符合安全标准?
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.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/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9d74d47d93f5540e801834aa71b3bc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/903c1bb6f9fe8f9b9710683a3e601452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943b52e2889748a94dfe333dfa5ae576.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76fe9cc87f8e8389c94efa7e7caab2a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad548d3bb499aab6d0baf4032be99bfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7664a5f9b61fd010eda340986ca34b47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c894b7d6baa55c80c64e74748dad898.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)为方便市民徒步登山,市规划局预备将步道
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b03da3aee588e05b99c674302d069b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82d4b2ae7dbf34a7cdd48ab3a0830d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bcfbe9b99ff67027ed57798aea7c39c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f96f8ca823d812499d597d0ac72164dc.png)
您最近一年使用:0次
2024-01-20更新
|
700次组卷
|
3卷引用:重庆市沙坪坝区南开中学校2023-2024学年九年级上学期期末数学试题
重庆市沙坪坝区南开中学校2023-2024学年九年级上学期期末数学试题2024年重庆中考数学仿真押题模拟预测题(一)(已下线)九年级数学开学摸底考(北师大版九上+九下第一章,辽宁专用)-2023-2024学年初中下学期开学摸底考试卷
名校
10 . 如图,小明为了测量小河对岸大树BC的高度,他在点A测得大树顶端B的仰角是
,沿斜坡走
米到达斜坡上点D,在此处测得树顶端点B的仰角为31°,且斜坡AF的坡比为
(参考数据:
,
,
)
(2)大树
的高度约为多少米?(精确到0.1米)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/789456756dc4b993919ecd45b9b7377d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d65e051e943ab28fa57aee2fb57994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1b659daf103d2d3f906c274a2532e37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41385beeda899e295ae092fa47ec8a30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d249aadf01efdd3dbc712ef5f58348.png)
(2)大树
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次
2023-12-29更新
|
375次组卷
|
9卷引用:【全国百强校】重庆市第八中学校2019届九年级(上)期末数学试卷
【全国百强校】重庆市第八中学校2019届九年级(上)期末数学试卷【校级联考】江苏省连云港市灌云县西片2019届九年级下学期第一次月考数学试题山东省潍坊市青州市2019-2020学年九年级上学期期中数学试题山东省潍坊市诸城市2019-2020学年九年级上学期期中数学试题四川省内江市第二中学2023-2024学年九年级上学期第二次质量检测数学试题(已下线)九年级数学开学摸底考(沪科版九上下册,安徽专用)-2023-2024学年初中下学期开学摸底考试卷河南省南阳市内乡县2023-2024学年九年级上学期期末数学试题安徽省滁州市定远县第一初中教育集团2023-2024学年九年级下学期开学考试数学试题2024年四川省达州市渠县中学九年级中考第三次模拟测试数学试题