名校
1 . 如图,在平行四边形ABCD中,P,Q分别是BC和CD的中点.
![](https://img.xkw.com/dksih/QBM/2021/1/6/2630197904957440/2632908828786688/STEM/68db3f10a3444126a2cd842a2f95e8cd.png?resizew=154)
(1)若
,
,
,求
及
的余弦值;
(2)若
,求
的值.
![](https://img.xkw.com/dksih/QBM/2021/1/6/2630197904957440/2632908828786688/STEM/68db3f10a3444126a2cd842a2f95e8cd.png?resizew=154)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b89e7ff008dea7530bdc4ea5b6419d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5cb63aeea0b37799404c8fec092b21d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd5d4ad19f64c408b627ff9f6146a733.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febf7413b35cf2889fdb57a6b519087c.png)
您最近一年使用:0次
2021-01-10更新
|
208次组卷
|
2卷引用:江苏省吴江中学2020-2021学年高一下学期3月月考数学试题
名校
2 . 在直角梯形
中,
,
,
,
是
的中点,
是
上一点,(不包括端点,
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12143a06ed24558d8cc7ad39961d3e1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4795ee1f96b430529934e2231b38885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829e8048ebd0aab3d84e9181c3895c1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9ebeb198e80f9c2e6406f0601554b92.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/3ccb7046-0be0-4e9c-8a04-1816768864aa.png?resizew=181)
您最近一年使用:0次
21-22高一·江苏·课后作业
解题方法
3 . 如图所示,D是BC边的一个四等分点.试用基底
,
表示
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64d59ac6538a0f4d79fb825e082081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bd98a891fa65f2fc6688001b03185d0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/356efd3d-e9cb-42ed-98a7-dafd426d307b.png?resizew=184)
您最近一年使用:0次
4 . 在△ABC是边长为2的等边三角形,
(1)求
的值;
(2)若点D在BC边上,且
,求r+s的值.
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf586f28e8fbdd8c30227f60d1aba660.png)
(2)若点D在BC边上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7dc762df54ca63d0d255b81a7fe5c57.png)
您最近一年使用:0次
5 . 已知
,
,点G是△OAB的重心,过点G的直线PQ与OA、OB分别交于P、Q两点.
(1)用
、
表示
;
(2)若
m
,
n
,试问
是否为定值,证明你的结论.![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/ccff13b2-d2c4-4679-9098-4d5f7cb40979.png?resizew=143)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/133cd19da38d7d564d836f0fa861b2f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/104d405e7775e8f30aa666178b9ce160.png)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2859333183a1d5749eac25f8b4e3b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efda714bc270ccf8712aaf16f7b08b82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5607a9e54691b9509273a1b09071ae5a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d4f48474e9474c47df7fac13ad547d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2859333183a1d5749eac25f8b4e3b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7a4776ce3cf78d6127b09c69a7ff255.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efda714bc270ccf8712aaf16f7b08b82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a056c6f051e0affc8721f14614e8f2c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/ccff13b2-d2c4-4679-9098-4d5f7cb40979.png?resizew=143)
您最近一年使用:0次
10-11高一下·陕西·期末
名校
6 . (Ⅰ)如图1,
是平面内的三个点,且
与
不重合,
是平面内任意一点,若点
在直线
上,试证明:存在实数
,使得:
.
(Ⅱ)如图2,设
为
的重心,
过
点且与
、
(或其延长线)分别交于
点,若
,
,试探究:
的值是否为定值,若为定值,求出这个定值;若不是定值,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3933f3a781f660f17868e8a3ab46d2f7.png)
(Ⅱ)如图2,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eb26800893b48ba93adb08bb27b0828.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c5eeae67a55af37ed525cf99e645a58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27e62ba44cbfec6823ebc1f0c7457fb.png)
![](https://img.xkw.com/dksih/QBM/2011/9/9/1570307447824384/1570307453329408/STEM/eac863d4311e4938aca3248dd8bfe3a0.png?resizew=358)
您最近一年使用:0次
2016-12-01更新
|
1268次组卷
|
7卷引用:江苏省连云港市东海高级中学2022-2023学年高一下学期学期第一次月考数学试卷
江苏省连云港市东海高级中学2022-2023学年高一下学期学期第一次月考数学试卷(已下线)2010-2011学年陕西省师大附中高一下学期期末考试数学试卷(已下线)2011-2012学年浙江省宁波四校高一下学期期中数学试卷沪教版(2020) 必修第二册 同步跟踪练习 第8章 平面向量 单元测试卷(已下线)专题13 平面向量(练习)-2沪教版(2020) 必修第二册 同步跟踪练习 第8章 测试卷贵州省黔西南州金成实验学校2021-2022学年高一下学期4月质量监测数学试题
名校
解题方法
7 . 在平行四边形ABCD中,边
,
,
,若M,N分别是边BC,CD上的点,且满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c144e9b7986f74a0e45eff488b1304.png)
.
(1)当
时,若
,求
;
(2)试求
取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7dbf31dfd36aa456a63bafea8bc1985.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c144e9b7986f74a0e45eff488b1304.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd2e48341bf9ce1d6ba26b31616f97b0.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a2a34b4317deffa40ba34e269c2b81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a42b8a4e130af974aa5ebfc487fbe8a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc4c63a548b91061528aa11058de75.png)
(2)试求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd92ed9c7d216873545ea59101b6ce1b.png)
您最近一年使用:0次
解题方法
8 . 如图,在平面四边形
中,
与
不平行,
,
分别是边
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/50d11b28-3c02-418c-ba6c-fd3783ee06a9.png?resizew=126)
(1)已知
,求实数
,
的值;
(2)已知
,
,
,求线段
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/50d11b28-3c02-418c-ba6c-fd3783ee06a9.png?resizew=126)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/742d8701114c39e8301ce79ef7740846.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1100379a4385b9ce064847bc21760adc.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2672fdc780c2ee0003f9b5ef6bb19c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
您最近一年使用:0次
解题方法
9 . 如图,圆
的半径为2,点
是圆
的一条半径
的中点,
是圆
过点
的动弦.
(1)当
是
的中点时,求
的值;
(2)若
,
,
,且
.
①
,
的值;
②求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/701f3b0e2bedfe5195443459072d798e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc5c19ac440746be97d8b46af5d288a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/701f3b0e2bedfe5195443459072d798e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/701f3b0e2bedfe5195443459072d798e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc5c19ac440746be97d8b46af5d288a.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc5c19ac440746be97d8b46af5d288a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966cffc5b051442a32d6a3c5abc34bd1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad9a05c19567052ef0fb5b72d602846.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13c62e7c58606b2250c6d189d85a6ea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a602688e014bb86d21fb27a9734aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e93b7ed9f0eb47f3e0af1ae85f649fb6.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13c62e7c58606b2250c6d189d85a6ea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c244f8b91e685ed8fca1709a25c9f91.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deb82273ca637b69f3ac3138295b8b00.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/770a4de6-0a2c-481a-8201-ab95487a7be8.png?resizew=131)
您最近一年使用:0次
解题方法
10 . 已知点
,
,倾斜角为
的直线
与单位圆在第一象限的部分交于点
,
与
轴交于点
,
与
轴交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/c89a2158-0512-4946-a5e0-866b5b53a932.png?resizew=231)
(1)设
,
,试用
表示
与
;
(2)设
,试用
表示
;
(3)求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8c59f28ff09ad1123be71defccf4c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7ef960992dfb11fb987d7c26cb5e4ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/c89a2158-0512-4946-a5e0-866b5b53a932.png?resizew=231)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a97dcd26252a31ec984738caa58f86a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a92de3697940dc817b0eeb6ae9c1bce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b97143bdbceb6fadd18da87820ae32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
您最近一年使用:0次