名校
1 . 瑞云塔是福清著名的历史文化古迹.如图,一研究性小组同学为了估测塔的高度,在塔底
和
,
(与塔底
同一水平面)处进行测量,在点
,
处测得塔顶
的仰角分别为45°,30°,且
,
两点相距
,由点
看
,
的张角为150°,则瑞云塔的高度
=______ m
![](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/7f9e8449aad35c5d840a3395ea86df6d.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/7f9e8449aad35c5d840a3395ea86df6d.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de0ebcedfa8022e771f153f496c8281b.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2021/5/24/2728108241264640/2771109525536768/STEM/7b4a20d8-30b9-42aa-8798-129bdf7e4da2.png?resizew=211)
您最近一年使用:0次
2021-07-24更新
|
220次组卷
|
3卷引用:广东省揭阳市揭东区2020-2021学年高一下学期期末数学试题
名校
2 . 在高分辨率遥感影像上,阴影表现为低亮度值,其分布范围反映了地物成像时遮光情况的二维信息,可以通过线段
长度(如图:粗线条部分)与建筑物高度的几何关系来确定地表建筑物的高度数据.在不考虑太阳方位角对建筑物阴影影响的情况下,太阳高度角、卫星高度角与建筑物高度、线段
的关系如图所示,在某时刻测得太阳高度角为
,卫星高度角为
,阴影部分长度为L,由此可计算建筑物得高度为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/ff733cda-2b3b-43b8-a1ec-d17885d4ef01.png?resizew=266)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/ff733cda-2b3b-43b8-a1ec-d17885d4ef01.png?resizew=266)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
您最近一年使用:0次
2020-07-24更新
|
341次组卷
|
6卷引用:广东省揭阳市揭东县2020-2021学年高二上学期期末数学试题