名校
解题方法
1 . 如图是一种升降装置结构图,支柱
垂直水平地面,半径为1的圆形轨道固定在支柱
上,轨道最低点
,
,
.液压杆
、
,牵引杆
、
,水平横杆
均可根据长度自由伸缩,且牵引杆
、
分别与液压杆
、
垂直.当液压杆
、
同步伸缩时,铰点
在圆形轨道上滑动,铰点
在支柱
上滑动,水平横杆
作升降运动(铰点指机械设备中铰链或者装置臂的连接位置,通常用一根销轴将相邻零件连接起来,使零件之间可围绕铰点转动).
的长为
,求水平横杆
的长和
离水平地面的高度
(用
表示);
(2)在升降过程中,求铰点
距离的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0101a7b5c8a4aed0de2af363792e39a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0101a7b5c8a4aed0de2af363792e39a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f9651b17b98d75a87a7e502202d32e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a987d8689e9a5556f98c37ea485afeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a3e520a16d4fdd73c4e6a4ce7be0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d62e8aadaadebf1454fde21a390ebdea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14b49022a6f55817b5d7e3ab443b5491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971b23e3ee827018557d6c88edd5369a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14b49022a6f55817b5d7e3ab443b5491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971b23e3ee827018557d6c88edd5369a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a3e520a16d4fdd73c4e6a4ce7be0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d62e8aadaadebf1454fde21a390ebdea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a3e520a16d4fdd73c4e6a4ce7be0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d62e8aadaadebf1454fde21a390ebdea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f268424db595e480bbd58f1b7a2e1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09af0df7030bbefc8711456da8d87b38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0101a7b5c8a4aed0de2af363792e39a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107fd7b3176ecb59eba848fe8d87d114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/598c4ff9fc8518fa4829e39254d3f6e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)在升降过程中,求铰点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09af0df7030bbefc8711456da8d87b38.png)
您最近一年使用:0次
2024-01-29更新
|
443次组卷
|
3卷引用:浙江省台州市2023-2024学年高一上学期1月期末数学试题
浙江省台州市2023-2024学年高一上学期1月期末数学试题(已下线)专题02三角函数的图像与性质期末10种常考题型归类-《期末真题分类汇编》(人教B版2019必修第三册)湖北省襄阳市第四中学2023-2024学年高一下学期质量检测(一)数学试题
20-21高一·浙江·期末
解题方法
2 . 已知
是沿海东西走向的全长
千米的高速公路,小岛
位于
的正北方,且距离
千米.赴
旅行的游客从
点出发坐旅游大巴至
点后换成快艇至岛
.已知旅游大巴的平均速度为
千米每小时,快艇的平均速度为
千米每小时,换乘点
设在从
至
用时最少处.
![](https://img.xkw.com/dksih/QBM/2021/1/19/2639388061376512/2639423612985344/STEM/bb4d0d41-a934-4943-b5f3-52015e33996f.png?resizew=226)
(1)求
、
间的距离(用
表示)
(2)每日上午
时起,每隔
小时有一辆旅游大巴发车至
点,即发快艇且忽略换乘时间.若某日
时,有一风圈半径为
千米的七级台风,其中心位于
点正北
千米的洋面
点,并以上
千米每小时的速度垂直斜面
移动.为使快艇不至于进入台风风圈,若该日只发了
趟车,求
的距离
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.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/b250e19d33392c9022b7417ae7e2467d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc13a607ac0c7f76d252d7cb1bb040fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dae3db3ed7c7ec12b0c302a998e2d66.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://img.xkw.com/dksih/QBM/2021/1/19/2639388061376512/2639423612985344/STEM/bb4d0d41-a934-4943-b5f3-52015e33996f.png?resizew=226)
(1)求
![](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/0c88d9142df6ba8e43c1a93bd04a1362.png)
(2)每日上午
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/142d7ec5361df5853533602b2be11460.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc8e8298556654fd566ea3832f9f0c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a94739218003e95c2c8149789cece756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
名校
解题方法
3 . 在海岸
处,发现北偏东
方向,距离
为
海里的
处有一艘走私船,在
处北偏西
方向,距离
为
海里的
处有一艘缉私艇奉命以
海里/时的速度追截走私船,此时,走私船正以
海里/时的速度从
处向北偏东
方向逃窜.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/2a805fd9-88b5-48f8-b5de-3d4e46e9a1ee.png?resizew=201)
(1)问
船与
船相距多少海里?
船在
船的什么方向?
(2)问缉私艇沿什么方向行驶才能最快追上走私船?并求出所需时间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9563540452712a60d70f76cf22a868c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a4c9b697e3df2b5469b71d3b5e47a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e4123975f257306440158659634c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/2a805fd9-88b5-48f8-b5de-3d4e46e9a1ee.png?resizew=201)
(1)问
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)问缉私艇沿什么方向行驶才能最快追上走私船?并求出所需时间.
您最近一年使用:0次
2020-05-10更新
|
2262次组卷
|
10卷引用:【新东方】高中数学20210429—012【2021】【高一下】
(已下线)【新东方】高中数学20210429—012【2021】【高一下】浙江省杭州市学军中学(紫金港学区)2020-2021学年高一下学期期中数学试题天津市第七中学2019-2020学年下学期高一期中考试数学试题天津市河东区2019-2020学年高一下学期期中数学试题江苏省连云港市赣榆区智贤中学2019-2020学年高一下学期5月月考数学试题江苏省南京市第一中学2019-2020学年高一下学期期中数学试题湖南省娄底市第一中学2020-2021学年高一下学期期中数学试题江苏省无锡市第六高级中学2020-2021学年高一下学期期中数学试题陕西省西安中学2020-2021学年高二(实验班)上学期第一次月考理科数学试题甘肃省张掖市第二中学2021-2022学年高二上学期10月月考数学 理科(B)试题
4 . 如图,半圆
的直径为2,
为直径延长线上的一点,
,
为半圆上任意一点,以
为一边作等边三角形
.设
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/21c8762d-752e-41bc-929c-63b8e7cc6687.png?resizew=159)
(1)当
,求四边形
的面积;
(2)当
为何值时,线段
最长并求最长值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9774f83067ed956a551bc41adcce0469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb7e00f8bacce4d649b535449f04568c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/21c8762d-752e-41bc-929c-63b8e7cc6687.png?resizew=159)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93532b51c05e988a021b8132b5b207d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ea16ceca816f7d3d50650af141baf42.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
您最近一年使用:0次