名校
1 . 为了培养学生的数学建模和应用能力,某校组织了一次实地测量活动,如图,假设待测量的树木
的高度
,垂直放置的标杆
的高度
,仰角
三点共线),试根据上述测量方案,回答如下问题:
(1)若测得
,试求
的值;
(2)经过分析若干测得的数据后,大家一致认为适当调整标杆到树木的距离
(单位:)使
与
之差较大时,可以提高测量的精确度,.若树木的实际高为
,试问
为多少时,
最大?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5922f9b5406a4857744c30348740a4b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c7cd83e17de55b813146ec1b2dcd730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d93280f0604007ef539d392325f3c5e.png)
(1)若测得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2fa7198aafc8901ae5022651da12dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
(2)经过分析若干测得的数据后,大家一致认为适当调整标杆到树木的距离
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c59b14235ee9b4651047e7d57f65955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f70dacf39de75e7a9f7081f646013a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/16/0914541a-1eaa-481d-9519-bb64def71b1a.png?resizew=207)
您最近一年使用:0次
2018-11-18更新
|
591次组卷
|
3卷引用:【全国百强校】福建省厦门外国语学校2018-2019学年高二上学期期中考试数学(文)试题