如图,某超市的仓储中心有一斜坡
,其坡度为
,顶部处的高
,B、C在同一水平地面上.
![](https://img.xkw.com/dksih/QBM/2022/12/9/3127186540601344/3128712448573440/STEM/1406859834db48a3a65baadc97631b6a.png?resizew=181)
(1)求斜坡
长度;
(2)矩形
为长方体货柜的侧面图,其中,将该货柜沿斜坡向上运送,此时
,身高为
的小明站在B处看到点D正上方
处有一盏吊灯.求点D离地面的高度并求出小明的仰角
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/056f46f369b286bd7f47f8635aed6204.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9156e59179e57562acc3e4fa29ca7f9.png)
![](https://img.xkw.com/dksih/QBM/2022/12/9/3127186540601344/3128712448573440/STEM/1406859834db48a3a65baadc97631b6a.png?resizew=181)
(1)求斜坡
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08baea7b9484edb63bc58bbe025c8b46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a8e0dd69d0e161c6609263946105c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6244c4be2c661dc2166885d65bbad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
更新时间:2022-12-11 19:24:40
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【推荐1】如图,某蔬菜种植大棚一侧框架,它的上半部分是一个等腰
,其中腰长
与底边
的比是
,它的下半部分是矩形
,点F、H是
边的三等分点,点G、I是
边的三等分点.已知,制造这一侧框架的材料总长(图中所有黑线的长度和)为42米,设
的长是x米,
的长是y米.
(1)请直接写出y与x的函数关系式__________;
(2)若该侧框架围成图形的面积用S表示,请直接写出S与x之间的函数关系__________;
(3)当x等于多少米时,此框架围成图形的面积是28平方米(第2问结论可直接应用)?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86c33e42522dda2d2e847f3f1b559cff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077956e5f55232814d1a077af264590e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/19/e965c07b-f1eb-4bcb-84db-58d44fc5db6d.png?resizew=147)
(1)请直接写出y与x的函数关系式__________;
(2)若该侧框架围成图形的面积用S表示,请直接写出S与x之间的函数关系__________;
(3)当x等于多少米时,此框架围成图形的面积是28平方米(第2问结论可直接应用)?
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【推荐2】在
中,
,
,D为线段
上的动点,连接
,将
绕点D顺时针旋转
得到
,连接
,
.
(1)如图1,当
时,求证:
;
(2)如图2.当
,
时,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d384390f4e0a1e0abd4cc19382d94db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb2cf0e95fdf1fd8a5b01d3dfd905e08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/16/98daeaf5-4d47-4785-8ebf-64f97f991f28.png?resizew=274)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97cf714ffb3fd5917a76b191640b55fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d64a983d34dd27801d526bb99541b5dd.png)
(2)如图2.当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44cbab64c34b6317ee4c68ba7f8d56c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9bc052a11cf1a01445992672dde2836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
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【推荐1】如图,小文在数学综合实践活动中,利用所学的数学知识测量居民楼的高度
,在居民楼前方有一斜坡,坡长
,斜坡
的坡度
小文在点
处测得楼顶端
的仰角为
,在
点处测得楼顶端
的仰角为
点
,
,
,
在同一平面内
.
结果精确到
,参考数据:
,
,
,
,
,
,
度数;
(2)求居民楼的高度
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83f9d900f45644fc4e35f4703ae331db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f419cdf146787447e2c35d48838055f.png)
![](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/6e0be75f41c333a533e197da7f2ec5da.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/7629e257b4420eed6fc6f16f7cbdc5a4.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)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f328ba89c0a92a4447788b65571f7aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f03af4c4f4715467d9584cb275aa03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caecb5a64e4c56138391b030d9f584f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b62580ee5d502b5dc35b0096ffdceea0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94db197f1ac6b6e1184e677f8f7b8d3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6068e49ccc9c5ad6a7a8cbe4fd76e7d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/287a75ae2b297ccc8f41e1daf6bf1a20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d5d4bb14291cb684381590733916b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5157b42da58d55daad27d98b2fec15ff.png)
(2)求居民楼的高度
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐2】如图,某数学课外活动小组利用课余时间,测量了安装在一幢楼房顶部的公益广告牌的高,如图,
为楼房的高,且
三点共线,在楼房的侧面
处,测得点
与点
的仰角分别为
和
,
米,根据以上测得的相关数据,求这个广告牌的高(
的长)(结果精确到
米,参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09a54feefec70ed7556557af1d57e5af.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/24/46d9cf65-8010-4ad5-a493-24befbb69db7.png?resizew=161)
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【推荐1】某体育场有一个垂直于底面的旗杆
,其旁边有一个坡面
,经测量发现,坡比
,
长为2米,小明在
点测得旗杆顶点
的仰角为19.2°,在点
处测得旗杆顶点
的仰角为45°,且
三点在同一条水平线上,求旗杆
的高度.(结果保留小数点后一位,参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c76199ba30be7742372e249293b6c1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f223740ec3b688a7a55c06ec8b57d85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a80fa05af4f8f6f2101dcc626e35b8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/31eb6112-2673-47f7-9561-1059eab8e737.png?resizew=221)
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【推荐2】小明同学在综合实践活动中对本地的一座古塔进行了测量.如图,他在山坡坡脚P处测得古塔顶端M的仰角为
,沿山坡向上走25m到达D处,测得古塔顶端M的仰角为
.已知山坡坡度
,即
,请你帮助小明计算古塔的高度ME.(结果精确到0.1m,参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/260200d547998bcac50a4a491382e7f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/996bf3d35b6763cbc1a423b13a9df2dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2450156c6f081864f1efcf10af156e47.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47bb3f35e3db7c1f3a3dd3eb20151b5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/30/3f04b832-d592-4f02-839a-7244e06615bb.png?resizew=130)
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【推荐3】某工程队计划测量一信号塔OC的高度,由于特殊原因无法直接到达信号塔OC底部,因此计划借助坡面高度来测量信号塔OC的高度;如图,在信号塔OC旁山坡坡脚A处测得信号塔OC顶端C的仰角为70°,当从A处沿坡面行走13米到达P处时,测得信号塔OC顶端C的仰角刚好为45°.已知山坡的坡度i=1:2.4,且O,A,B在同一直线上.
![](https://img.xkw.com/dksih/QBM/2022/4/21/2963035028881408/2963851892023296/STEM/945148cb-3b98-40b6-bdc1-6340550db129.png?resizew=239)
(1)求点P到水平地面OB的距离.
(2)求信号塔OC的高度.(侧倾器高度忽略不计,结果精确到0.1米,参考数据:sin70°≈0.94,cos70°≈0.34,tan70°≈2.7.)
![](https://img.xkw.com/dksih/QBM/2022/4/21/2963035028881408/2963851892023296/STEM/945148cb-3b98-40b6-bdc1-6340550db129.png?resizew=239)
(1)求点P到水平地面OB的距离.
(2)求信号塔OC的高度.(侧倾器高度忽略不计,结果精确到0.1米,参考数据:sin70°≈0.94,cos70°≈0.34,tan70°≈2.7.)
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