如图,在平行六面体
中,底面
是边长为
的正方形,侧棱
的长为
,且
.求:
的长;
(2)直线
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f9ec447356842c12da7c8ae1d2d8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c92b5799d12ea37de46d7c942ce7a9.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b435d7fc33860ae191f9111d880b40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
21-22高二上·全国·课后作业 查看更多[9]
人教A版(2019) 选择性必修第一册 新高考名师导学 第一章 复习参考题 1广东省广州中学2021-2022学年高二上学期期中数学试题(已下线)复习参考题 1人教A版(2019)选择性必修第一册课本习题第一章复习参考题河南省许昌市建安区第一高级中学2023-2024学年高二上学期10月月考数学试题四川省眉山市青神县青神中学校2023-2024学年高二上学期期中数学试题广东省广州市第六十五中学2023-2024学年高二上学期10月学情检测数学试题重庆市长寿区八校联考2023-2024学年高二上学期期末检测数学试题(B卷)(已下线)期末押题卷01(考试范围:苏教版2019选择性必修第二册)-【帮课堂】2023-2024学年高二数学同步学与练(苏教版2019选择性必修第二册)
更新时间:2024-01-20 00:27:33
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解答题-问答题
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适中
(0.65)
解题方法
【推荐1】如图,在四棱柱ABCDA1B1C1D1中,底面ABCD是平行四边形,E,F,G分别是A1D1,D1D,D1C1的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/4ffa9c6e-c20b-4253-bab7-c050c7797405.png?resizew=203)
(1)试用向量
,
,
表示
;
(2)用向量方法证明平面EFG
平面AB1C.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/4ffa9c6e-c20b-4253-bab7-c050c7797405.png?resizew=203)
(1)试用向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fe2d802f2b37e7db198c5a3c1df9a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/228f4ddbb8959f904d71259be7c6ab36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d0ed5745ba16ce0dd9c04e90352411.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7b1ee3217b5a9e19488f4b98fd36c9f.png)
(2)用向量方法证明平面EFG
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
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【推荐2】如图,在长方体ABCD-A1B1C1D1中,AB=3,AD=2,AA1=1,以长方体的八个顶点中的两点为起点和终点的向量中.
![](https://img.xkw.com/dksih/QBM/2018/9/20/2036317349928960/2050099553042432/STEM/f985d02b68d647839fd8d2c6418d7468.png?resizew=116)
(1)单位向量共有多少个?
(2)试写出模为
的所有向量.
(3)试写出与
相等的所有向量.
(4)试写出
的相反向量.
![](https://img.xkw.com/dksih/QBM/2018/9/20/2036317349928960/2050099553042432/STEM/f985d02b68d647839fd8d2c6418d7468.png?resizew=116)
(1)单位向量共有多少个?
(2)试写出模为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30efdb9c7eb4b788352056f3edf21635.png)
(3)试写出与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547fe456ec0fb6da86350d14e95dae4f.png)
(4)试写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df1d587dba6d7b9c8e428ef33eda1589.png)
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解答题-证明题
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适中
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解题方法
【推荐1】如图,已知空间四边形
每条边长和对角线长都等于1,
,
,
分别是
,
,
的中点.
(1)求证:
;
(2)求
的长;
(3)求异面直线
和
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/4/94515d6a-1426-4f9d-9e7e-82cfd8d6912c.png?resizew=146)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb023313112cd8a6068d013fdcc9a193.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
(3)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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【推荐2】如图,在四棱锥
中,底面ABCD是边长为1的正方形,侧棱PA的长为2,且PA与AB、AD的夹角都等于60°,M是PC的中点,设
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/8c8e1d12-57a3-48cb-b028-78df98232236.png?resizew=153)
(1)求证
;
(2)求BM的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e7a93a1399ff7a2bde342652479241b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b54aa2b7f9adf409f0ce8e00615432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e28eb023fe260d9b50fcc441e1df95e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/8c8e1d12-57a3-48cb-b028-78df98232236.png?resizew=153)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c4a08422947cfb7d16535225bdc2935.png)
(2)求BM的长.
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解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】在四棱柱
中,底面
为平行四边形,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/10/f8da4206-e49d-4269-b839-92de6c075d25.png?resizew=203)
(1)用
表示
,并求
的长;
(2)若
为
中点,求异面直线
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca1261408ad769c89952d8228675c25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde9cae2c1df3951175b2a8cd6ad84ee.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/10/f8da4206-e49d-4269-b839-92de6c075d25.png?resizew=203)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d68873c59a21b0cd408cdf2b47d51096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccec46f7c4da972fef6e940158628242.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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解题方法
【推荐2】如下图所示,已知空间四边形
的每条边和对角线长都等于1,点
分别是
的中点,求:
![](https://img.xkw.com/dksih/QBM/2021/12/1/2862985107562496/2866712727920640/STEM/d10bffb0-e4f0-44af-8f93-dfb9c7639cf5.png?resizew=238)
(1)
的值;
(2)线段EG的长;
(3)异面直线
与
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b199a99e53d67ff4abf233930961a29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868a68302dfab497e705816c2b1c9708.png)
![](https://img.xkw.com/dksih/QBM/2021/12/1/2862985107562496/2866712727920640/STEM/d10bffb0-e4f0-44af-8f93-dfb9c7639cf5.png?resizew=238)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/836e89b00e0388273bfdc976abe3d006.png)
(2)线段EG的长;
(3)异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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解题方法
【推荐1】如图,在三棱台
中,
,
分别为棱
,
的中点.设
,
,
.
(1)用
,
,
表示,
,
;
(2)若
,用向量的方法证明
∥平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7b9d8a08fc52c31cc1a7f527d18b55c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f386f5b56b07b96f2600da1be15414a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2410e0e103cc41264a2d0f5c0e3f3ed4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/16/616a6dcd-4b02-4935-a3d0-37eb31008040.png?resizew=161)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24cc37b6cfb037ac5e114daeb3a3b68f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db1add0930989a720fb8f18547baed23.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d4d85b0b61d8e975657d8c3ffe8baca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a604466a9c8d10d557b3dfc43b547065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a3f5c4436466bed86c25c5f26ccbeb.png)
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适中
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【推荐2】如图所示,已知空间四边形
的每条边和对角线长都等于
,点
分别是
的中点.设
.求证
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52041559f8fee18bfa3e2e2ac07c3bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c4cd264c97c1f261229925cc5a6761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fb0493ebe599f2bc513e63e908bfd45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb023313112cd8a6068d013fdcc9a193.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/23/cb20dd46-8741-4d70-9c3c-648377eb23e3.png?resizew=169)
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