名校
1 . 在这春光明媚的季节里,2021江苏省梁丰高级中学“校长杯”班级足球联赛正如火如荼地举行,在高一年级某场比赛中,两个班级的比赛场地为矩形
(如图),现已知矩形中
米,
米,宽为5米的足球门
在边
的中间放置.
![](https://img.xkw.com/dksih/QBM/2021/4/12/2698055334961152/2787503097356288/STEM/b32f0db2-22cc-4a78-921d-d726a3e72802.png?resizew=277)
(1)比赛中,同学甲在距离
为18米,离
为12米的地点
处获得直接任意球机会,准备直接射门,求其有效射门角度;(求出
的某个三角函数值即可)
(2)同学乙在边线
上带球突破(视作点
在
边上移动),准备起脚向球门
射门,求该同学应在何处(
长为多少米时)射门角度最佳.(即使
最大)
(以上问题不考虑场上其他因素)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96d339637b67652b6e259f024aae661b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d5c3ccd350ed8aad71fed37ea423b90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/2021/4/12/2698055334961152/2787503097356288/STEM/b32f0db2-22cc-4a78-921d-d726a3e72802.png?resizew=277)
(1)比赛中,同学甲在距离
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c965c9363bde4338985d106288292c1c.png)
(2)同学乙在边线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfa70e7c9ef8b856b494d370b7d76482.png)
(以上问题不考虑场上其他因素)
您最近一年使用:0次
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解题方法
2 . 三角测量法是在地面上选定一系列的点,并构成相互连接的三角形,由已知的点观察各方向的水平角,再测定起始边长,以此边长为基线,即可推算各点坐标的一种测量方法.在实际测量中遇到障碍,无法得到平距的测量都需要用到三角测量法.如图,为测量横截面为直角三角形的某模型的平面图
,其中角ACB为直角,由于实际情况,它的边和角无法测量,以下为可测量数据:①
;②
;③
.请根据以上数据求出
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfb08f6a798dc293f3d8de281190f65e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edeeec35921747c6f9f5aed1a7b9932.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8588d9543f05208d26b33becfe0073fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/13/f5d35fc6-cefb-4960-b9f5-8df65a2d6350.png?resizew=212)
您最近一年使用:0次
2022-06-13更新
|
463次组卷
|
4卷引用:山东省济南市2021-2022学年高一下学期5月联合考试A卷数学试题
2020·全国·模拟预测
3 . 秦九韶在《数书九章》中提及了山高的测量方法:如图,已知树高
米,距山
米,人(人站在坡面上)在距树
米处望山,人目
、树顶
、山顶
在一条直线上,根据图可得
,得
,即可求出山高.此方法为我们提供了一种人在山坡上任选一点测量山高的方法,若
,
,
,
,则目高
( )(山高为
,目高
为眼睛到山脚的重直距离)
![](https://img.xkw.com/dksih/QBM/2021/1/12/2634695124287488/2635389340622848/STEM/5a76a197-9116-4ce3-859f-b8262c9a36a9.png?resizew=313)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/193e7005c259d6e89e5bcce71ffea772.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14c9ae7784e1e62d8135c84bd3d2e368.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86718fa3bd81961f00798692fbf86db1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68ced0786c01314bbb90a24cb900492f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f642cfbe71ace1a1c439dafa2b82dc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea5e7d9414ee7412c4888ff30384e48d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b95463a97c60db3250cb641bf6523d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/2021/1/12/2634695124287488/2635389340622848/STEM/5a76a197-9116-4ce3-859f-b8262c9a36a9.png?resizew=313)
A.4.91米 | B.3.91米 | C.2.91米 | D.1.91米 |
您最近一年使用:0次
名校
4 . 函数
的一个单调减区间为__________ .(答案不唯一)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e24184254c2b6ea516d8a5027bf25422.png)
您最近一年使用:0次
2023-03-21更新
|
339次组卷
|
4卷引用:安徽省皖北县中联盟2022-2023学年高一下学期3月联考数学试卷