名校
1 . 如图1,在梯形ABCD中,
,
,
,现将
沿AC翻折成直二面角
,如图2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/a7dcabff-0148-4a8b-a0e6-17c9d5506c8a.png?resizew=294)
(1)证明:平面
平面PAC;
(2)若异面直线PC与AB所成角的余弦值为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8ef58be8708144272538ee427fb92c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de3595bb7c79503fabd75d99196ccb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf29d07c3751c41ab3503065a5a5052e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/a7dcabff-0148-4a8b-a0e6-17c9d5506c8a.png?resizew=294)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a3fd5284e160896f07ce367645fd04.png)
(2)若异面直线PC与AB所成角的余弦值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33b7213d99a817bff19bcf740a0697c.png)
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解题方法
2 . 已知平行六面体
中,底面ABCD是边长为1的正方形.
,
.
(1)求线段
的长;
(2)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/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ecbca919bff5a39a99dd7f867dd61f2.png)
(1)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
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解题方法
3 . 如图1,在直角梯形
中,
,
,
,E是AB的中点. 沿DE将
折起,使得
,如图2所示. 在图2中,M是AB的中点,点N在线段BC上运动(与点B,C不重合).在图2中解答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/590c0993-8af5-47b6-9649-a4d6b40adebd.png?resizew=411)
(1)证明:平面
平面
;
(2)设二面角
的大小为,求
的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec2d5ab801f2a84b78139b0ea2c5032b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a48e31deb78dadacc7e128ef3eb2a054.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/590c0993-8af5-47b6-9649-a4d6b40adebd.png?resizew=411)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dec9c5d7af1c18018bce59adcd761e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)设二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40eeae10fae2874021a79d81bdd9cdd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43660b1543b3a2b46185f7629d28a963.png)
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解题方法
4 . 如图,在三棱柱
中,
平面
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/f4d2d749-8857-4d46-93cf-3967ed518dc8.png?resizew=129)
(1)求证:
;
(2)求二面角
的余弦值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8bd8c13192ca45c16dad5d59b547220.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09bdbf17f7bb0e70a339b4a1971d5c0b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/f4d2d749-8857-4d46-93cf-3967ed518dc8.png?resizew=129)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba985fb50a9078a839b66bf1d1eadea9.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/185729402f3b20ac3e0b003be9b385eb.png)
您最近一年使用:0次
2022-11-10更新
|
127次组卷
|
2卷引用:北京市第六十六中学2022-2023学年高二上学期期中质量检测数学试题
名校
解题方法
5 . 如图所示的多面体是由底面为
的正方体被截面
所截而得到的,其中
,
,
,
.则二面角
的余弦值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/ca121fe7-db36-4f9a-8cc4-51e3de87d0f4.png?resizew=216)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37750daa8ba3b3fe3e9e2092f81c848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c68309d3410c05f5675968900e91fbd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faffe3765c15f53305516895aa595a9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/363d54a39245a880ccc6a4d4286eba9e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/ca121fe7-db36-4f9a-8cc4-51e3de87d0f4.png?resizew=216)
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 在四棱锥
中,底面
为直角梯形,
,
,侧面
底面
,
,
,且
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/3f28a74f-db45-427b-aa0c-d64876847728.png?resizew=193)
(1)证明:
平面
;
(2)若直线
与平面
所成的角为
,求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63e4d19bf237a6fca67e0d01a9ddb726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc01b1ea3c7efd39d1454d408040d74b.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/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/3f28a74f-db45-427b-aa0c-d64876847728.png?resizew=193)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78172568aac9805d2ea2d5f742bf80c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
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解题方法
7 . 已知正三棱锥P-ABC的所有棱长均为
,点E,F分别为PA,BC的中点,点N在EF上,且
,设
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/7a9891cc-d3ae-4971-9449-95e37ffd1967.png?resizew=151)
(1)用向量
表示向量
;
(2)求PN与EB夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e4b5a2ccac15d3015249bd19a1876f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d91f0d4a64f599976effc1730cefdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ae7dc09ab4960c7e8df32c39a573448.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/7a9891cc-d3ae-4971-9449-95e37ffd1967.png?resizew=151)
(1)用向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e12e95f703ad30ab9a3d38376830989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2e331e5e22fdb7a057526934384c41.png)
(2)求PN与EB夹角的余弦值.
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8 . 空间四边形
中,
,
,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c8dbc31b2e14067ef2f34b4e25f114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4720056bd07b4a3da7bb536a85c87a2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9acdabbbcfa6185a39659a416a4218.png)
A.0 | B.![]() | C.![]() | D.![]() |
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解题方法
9 . 如图,在直三棱柱
中,
,
,
,
分别是棱
,
上的动点;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/914aa727-2d10-4c14-8cab-e8896b5bdfbc.png?resizew=157)
(1)当
时,求证:
;
(2)已知
为
中点时,线段
上是否存在点
,使得平面
与平面
夹角的余弦值为
,若存在,请确定点
的位置,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f2185273bf04c11118c7954f7ec822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4a5de1a00f05882ed47060b96f6df4c.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/914aa727-2d10-4c14-8cab-e8896b5bdfbc.png?resizew=157)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f8eebda19eded2b059774a8c2666c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30c6898dcd2374de8bed162d63903fa2.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417022242845ca611c8b0c2edc484710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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解题方法
10 . 如图,平行六面体
的底面
是菱形,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/645bd0c6d09c23a5f0db9d612e3e8d87.png)
,且
,则异面直线
与
所成角的余弦值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/987eba85-d55c-40b8-8d3b-8e68ca0cae44.png?resizew=170)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec67c5e5076509bb83d0a303dc87e718.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/645bd0c6d09c23a5f0db9d612e3e8d87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7222a2d702fe89e8060d0ae30726ea6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec10a55672645a71bd9ca6b62c02241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0f0ccc8492a0ccf1eee24867060643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a037b1a3ec2e37bbcb05d0a467efb511.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/987eba85-d55c-40b8-8d3b-8e68ca0cae44.png?resizew=170)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-11-10更新
|
555次组卷
|
4卷引用:云南省玉溪市第一中学2022-2023学年高二上学期期中考试数学试题