20-21高一下·浙江·期末
名校
解题方法
1 . 某市需拍卖一块近似圆形的土地(如图),内接于圆的平面四边形
作为建筑用地,周边需做绿化.因地面限制,只能测量出
,测角仪测得角
.
![](https://img.xkw.com/dksih/QBM/2021/5/19/2724632215019520/2724659106045952/STEM/3009a1e0-aaa9-40e2-a2f9-cd16962a4b7d.png?resizew=210)
(1)求
的长;
(2)因地理条件限制,
不能变更,但点C可以调整.建筑商为利益最大化,要求在弧上设计一点C使得四边形
面积最大,求四边形
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8280c390081869e0c32e580a6fb11b51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eee296a7d9fba487f1485c61580196f.png)
![](https://img.xkw.com/dksih/QBM/2021/5/19/2724632215019520/2724659106045952/STEM/3009a1e0-aaa9-40e2-a2f9-cd16962a4b7d.png?resizew=210)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)因地理条件限制,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9df7fc746f8c4801d8f2f0471ba3297e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2021-05-19更新
|
696次组卷
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5卷引用:上海市金山中学2020-2021学年高一下学期期末数学试题
上海市金山中学2020-2021学年高一下学期期末数学试题上海市华东师范大学第三附属中学2021-2022学年高一下学期期末数学试题(已下线)【新东方】双师265高一下(已下线)【新东方】高中数学20210527-027【2021】【高一下】浙江省“七彩阳光”新高考研究联盟2020-2021学年高一下学期期中联考数学试题
名校
解题方法
2 . 某居民小区为缓解业主停车难的问题,拟对小区内一块扇形空地
进行改造.如图所示,平行四边形
区域为停车场,其余部分建成绿地,点
在围墙
弧上,点
和点
分别在道路
和道路
上,且
米,
,设
.
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712389904162816/2714330450247680/STEM/450b263c5a984642a72bb9313abfe3a8.png?resizew=181)
(1)当
时,求停车场的面积(精确到
平方米);
(2)写出停车场面积
关于
的函数关系式,并求当
为何值时,停车场面积
取得最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c40b8789cc8d81b3cf64f0b318ab982a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e88065e78982ab8a8b15bf573ca21476.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc790cfaa59a808c25a7edb95dc29fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/259728433d68902065408fb6a34c6d4d.png)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712389904162816/2714330450247680/STEM/450b263c5a984642a72bb9313abfe3a8.png?resizew=181)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a40d2cf43fce0c99dff3470d554eb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a87796ee30e6c5d5e6b6285b32abe10c.png)
(2)写出停车场面积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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2021-05-05更新
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1331次组卷
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4卷引用:上海市嘉定区2021届高三二模数学试题
上海市嘉定区2021届高三二模数学试题上海市第二中学2020-2021学年高一下学期5月月考数学试题(已下线)课时19 正弦定理、余弦定理和解斜三角形-2022年高考数学一轮复习小题多维练(上海专用)(已下线)专题05 解三角形(实际问题)-【解题思路培养】2022年高考数学一轮复习解答题拿分秘籍(全国通用版)
3 . 如图所示,某人为“花博会”设计一个平行四边形园地,其顶点分别为
(
),
米,
,
为对角线
和
的交点.他以
、
为圆心分别画圆弧,一段弧与
相交于
、另一段弧与
相交于
,这两段弧恰与
均相交于
.设
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/6/08547fc4-2573-46fa-acae-6c3297a4ccb3.png?resizew=264)
(1)若两段圆弧组成“甬路”
(宽度忽略不计),求
的长(结果精确到
米);
(2)记此园地两个扇形面积之和为
,其余区域的面积为
.对于条件(1)中的
,当
时,则称其设计“用心”,问此人的设计是否“用心”?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e819b87f90651d89fcd258c276294e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6032aee742b136f8ea08073426fcb2d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b977b90953db923c95e4a1643202b94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3afdb528817a379a5f67f39fc32741ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fa7a2d83e2d14f51579ba94a96a4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4841a7238ffb7413e715d0dfde3c15f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e47cd514b2920609e3781c87df6ab70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/473913c0887bb64d386f4c02f1853452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fb5c6efc2550a7b39a43708d8b8b1b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b56e44e4f0424a2b7a45567120a2e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fa7a2d83e2d14f51579ba94a96a4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/963dc96d575fec548fa582c4a38f5298.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/6/08547fc4-2573-46fa-acae-6c3297a4ccb3.png?resizew=264)
(1)若两段圆弧组成“甬路”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
(2)记此园地两个扇形面积之和为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8161dc93e1752d1b565ada8729176399.png)
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4 . 如图,目标A在某观测站C的北偏东
方向,从A出发有一条南偏东
走向的公路.在C处测得与C相距31千米的公路上的B处有一人正沿此公路向A走去,走20千米到达D处,此时测得
为21千米求.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/68ad5617-ec32-4d28-ba8f-6a962b9242fa.png?resizew=170)
(1)求
的值;
(2)求A、C两处的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31a14bd2a972f43d7a26a99589ad083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1845ed03ec08feac9adee161aab3449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/68ad5617-ec32-4d28-ba8f-6a962b9242fa.png?resizew=170)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e5d4f93699f8dcffb0e7840ca5597e.png)
(2)求A、C两处的距离.
您最近一年使用:0次
名校
5 . 如图所示,南山上原有一条笔直的山路
,现在又新架设了一条索道
,小李在山脚
处看索道
,发现张角
,从
处攀登400米到达
处,回头看索道
,发现张角
,从
处再攀登800米方到达
处,问索道
长多少(精确到米)?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e918b70b02a73685e3c536c7f380e2c.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/370a05af946767ab58b4640217173487.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/add7f2cb-3962-4cdb-b970-b4405674dfbb.png?resizew=178)
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解题方法
6 . 在周长为16的
中,
,则
的取值范围为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed4c4e8edbd179f3fc38a6653f18c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e3fa59bbd016ba85cd38499697434c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e057c31608d8a78166c09ddeb3a5a3.png)
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7 . 如图,货轮在海上以40海里
时的速度由
向
航行,航行的方向角
,
处有灯塔,其方位角
,在
处观察灯塔
的方位角
,由
到
需航行0.5小时,则
到灯塔
的距离是___________ 海里.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4333bb203d02814c146ed587b69ea69d.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/1d2f2080a04aec60522adff86b32e47f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a21deeec0936538640ceeda91a961e.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/6f603e4220135714d8cfaee8c0cb9d34.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/1da33a82-bb48-48e9-8d47-409894b7c98c.png?resizew=123)
您最近一年使用:0次
2021-03-25更新
|
138次组卷
|
2卷引用:沪教版(2020) 必修第二册 同步跟踪练习 第6章 三角 6.3.3 解三角形的应用
8 . 相距
有两个垂直于水平地面的高塔
和
,两塔底
、
的中点为
,已知
,
,则
的值是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb9d88e65a2566623a72c7009290c61b.png)
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e4315b145e70cf4f6e7ac8293587a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14518553ab06d26601773d2871ae4f5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46337843811aa7723d42cfd9d815bff1.png)
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2021-03-25更新
|
92次组卷
|
2卷引用:沪教版(2020) 必修第二册 同步跟踪练习 第6章 三角 6.3.3 解三角形的应用
9 . 当甲船位于
处时获悉,在其正东方向相距20海里的
处有一艘渔船等待营救.甲船立即将消息告知在甲船南偏东
,相距10海里
处的乙船,乙船距离渔船___________ 海里.
![](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/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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2021-03-25更新
|
191次组卷
|
3卷引用:沪教版(2020) 必修第二册 同步跟踪练习 第6章 三角 6.3 阶段综合训练
沪教版(2020) 必修第二册 同步跟踪练习 第6章 三角 6.3 阶段综合训练沪教版(2020) 必修第二册 同步跟踪练习 第6章 6.3阶段综合训练(已下线)6.4.3 余弦定理、正弦定理 (第3课时)应用举例(分层作业)-【上好课】2022-2023学年高一数学同步备课系列(人教A版2019必修第二册)
解题方法
10 . 在一次航模实验中,小船受到两个力的作用,已知
,
,且
,求合力
的大小及
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db12a06a74b361172c44dedca5e20cc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e5c87ed1df4e60109d3e5fb2e729b0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d828aed2b08635ea7f64402c4bbbbd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08493c1e001d85731cb4863ec38857fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/818ab913e0ade54bb034de4da2caf081.png)
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2021-03-25更新
|
108次组卷
|
2卷引用:沪教版(2020) 必修第二册 领航者 第8章 平面向量 8.1向量的概念和线性运算 第2课时 向量的加法和减法