1 . 如图,在三棱锥
中,侧面
是等边三角形,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/84bb54ad-2d69-4e8d-9f60-eccf4d3739b2.png?resizew=167)
(1)证明:平面
平面
;
(2)若
,则在棱
上是否存在动点
,使得平面
与平面
所成二面角的大小为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63e4d19bf237a6fca67e0d01a9ddb726.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/84bb54ad-2d69-4e8d-9f60-eccf4d3739b2.png?resizew=167)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8520a21b909d04f763d0f61dd74bc158.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf2f0df53aa68c9c334165034788166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
您最近一年使用:0次
2022-11-30更新
|
549次组卷
|
2卷引用:山西省大同市2022-2023学年高二上学期期中数学试题
名校
2 . 如图,在三棱柱
中,
底面
,
,点M为
的中点.
(1)证明:
平面
;
(2)在
上存在点N,且满足
,求二面角
的大小.
![](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/4eea99ab0ec843cb28f353b9b0bc27f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/3/65a75dc7-bef6-4a6c-9ff7-585344616e8b.png?resizew=166)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4557a368725226f2c8ea2efb7d30e478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de9078475c350c04bd97666d808dd55a.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2fbc7eb2b0191b98ad305c3c4e0a571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7165738abe803afb6ace7ed0c555508.png)
您最近一年使用:0次
3 . 如图,在三棱柱
中,侧面
是边长为2的菱形,
平面
,
为线段
的中点,
与平面
所成的角为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/17/cfd48aab-46d9-4122-b325-39b38331ed4e.png?resizew=172)
(1)证明:
平面
;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683a83dbcba2fc4f2a184ac47dbc7d89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/17/cfd48aab-46d9-4122-b325-39b38331ed4e.png?resizew=172)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f5830646a912c3a916beac4f88c116b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9539f8fb13345b449274b67bbda995db.png)
您最近一年使用:0次
解题方法
4 . 如图在直三棱柱
中,
,
,M为
的中点,
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/21/f7fe13d3-9d0c-439c-96a0-8d9c9d5016f8.png?resizew=145)
(1)求AB,BC的长度;
(2)求平面
与平面ABC所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc416a5b8dc234628e7475387888d82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dc93ef1a20fcf86ee65e4346712b353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03c5088536dad890222fe47df3de5efb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/21/f7fe13d3-9d0c-439c-96a0-8d9c9d5016f8.png?resizew=145)
(1)求AB,BC的长度;
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46b91c857bbe3c4f0f08dd2a4124a96e.png)
您最近一年使用:0次
2010·广东汕头·一模
名校
解题方法
5 . 如图在棱长均为2的正四棱锥
中,点
为
中点,则下列命题正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/9/17/2809959586594816/2815898628358144/STEM/b7aed891-432b-4378-bb47-9336a6a17843.png?resizew=276)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/2021/9/17/2809959586594816/2815898628358144/STEM/b7aed891-432b-4378-bb47-9336a6a17843.png?resizew=276)
A.![]() ![]() ![]() ![]() ![]() |
B.![]() ![]() ![]() ![]() ![]() |
C.![]() ![]() ![]() ![]() ![]() |
D.![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2021-09-25更新
|
836次组卷
|
13卷引用:山西省大同市平城区第一中学2019-2020学年高二上学期期中数学试题
山西省大同市平城区第一中学2019-2020学年高二上学期期中数学试题(已下线)汕头市2009-2010学年度第二学期高三级数学综合测练题(理三)(已下线)2010-2011学年湖北省长阳一中高二第二学期期中考试理科数学卷(已下线)2014届江西省新课程高三上学期第三次适应性测试理科数学试卷2014-2015学年湖北省安陆市一中高一下学期期末复习数学试卷2016届吉林四平一中高三五模理科数学试卷2016届吉林四平一中高三五模文科数学试卷2017-2018学年高三数学二轮同步训练:专题(30) 空间向量与立体几何智能测评与辅导[理]-空间向量与立体几何江西省宜春市靖安县靖安中学2019-2020学年高二上学期第二次月考数学(理)试题江西省靖安中学2019-2020学年高二上学期第二次月考数学(理)试题安徽省马鞍山中加双语学校2022-2023学年高二上学期期中数学试题第6章 空间向量与立体几何 综合测试
解题方法
6 . 在正方体
中,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
A.直线![]() ![]() ![]() |
B.直线![]() ![]() ![]() |
C.二面角![]() ![]() |
D.如果![]() ![]() ![]() ![]() |
您最近一年使用:0次
2023-11-11更新
|
226次组卷
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2卷引用:山西省大同市2023-2024学年高二上学期11月期中数学试题
解题方法
7 . 如图,四棱锥
的底面为直角梯形,
,点
为线段
的中点,
平面
平面
.
(1)求
的长;
(2)若直线
与平面
所成角的正切值为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cf1b611f3ef1ec92a4e171ede1e4566.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c982eb645d77aa24c642fca6d72e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54f3b703add3994f4f7a7c016619c664.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/3/fcc5022b-baca-4746-add0-04ed50da9425.png?resizew=142)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3bbd044331de221606f9e84e72e3ee3.png)
您最近一年使用:0次
名校
解题方法
8 . 如图,四棱锥
的底面是边长为4的正方形,
,且
为
的中点,则异面直线
与
所成角的余弦值为( )
![](https://img.xkw.com/dksih/QBM/2022/11/8/3105402708115456/3106723971309568/STEM/71ae20f67852467b91633b3193ce972d.png?resizew=189)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d19e69c3e231ac182ef14e0dda2fe45f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ef3d9cbe63c496e8ce46d6897ebed19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://img.xkw.com/dksih/QBM/2022/11/8/3105402708115456/3106723971309568/STEM/71ae20f67852467b91633b3193ce972d.png?resizew=189)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-11-10更新
|
454次组卷
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5卷引用:山西省大同市第三中学校2022-2023学年高二上学期期中数学试题
解题方法
9 . 已知
,
,则异面直线
与
所成角的余弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3054943bd68139b8ae10a66f102e58cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5145489defc5b199068e64720cbef934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-12-11更新
|
755次组卷
|
3卷引用:山西省大同市浑源县第七中学校2023-2024学年高二上学期第二次月考数学试题
山西省大同市浑源县第七中学校2023-2024学年高二上学期第二次月考数学试题江苏省无锡市滨湖区2021-2022学年高二上学期期中数学试题(已下线)第03讲 空间向量的应用-【帮课堂】2021-2022学年高二数学同步精品讲义(苏教版2019选择性必修第二册)
10 . 如图,四棱锥
,
,
,
,
为等边三角形,平面
平面
,
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/3e297d5d-59ab-4e40-8391-1ad89f0091b2.png?resizew=177)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3bbe4cdd2c154bd9a8073b0d4cecb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec2d5ab801f2a84b78139b0ea2c5032b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53502463cc76201000e02df314e58769.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/3e297d5d-59ab-4e40-8391-1ad89f0091b2.png?resizew=177)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14ddcfd8985d6ef923063a301e2bc5ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1069d514c3c32aeabd274475ee209ed6.png)
您最近一年使用:0次
2019-05-02更新
|
1630次组卷
|
8卷引用:山西省大同市2019-2020学期高三上学期第一次联合考试数学(理)试题