名校
解题方法
1 . 如图,在三棱锥
中,
,
,D为棱AB上一点,
,
,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/aaf3d75a-0264-4f24-8c88-ee4e313ca5be.png?resizew=187)
(1)证明:平面
平面ABC;
(2)线段PD上是否存在点M,使直线AP与平面MBC所成角的正弦值为
?若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74943af14e99617a1ba6a0d0b9b7ca5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cb673c01678316348bd4c6f1f5c9df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe7a201432af0a2f9d21c6803906f5c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/aaf3d75a-0264-4f24-8c88-ee4e313ca5be.png?resizew=187)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
(2)线段PD上是否存在点M,使直线AP与平面MBC所成角的正弦值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b1b60bf3180f638021f9cfad8c2132f.png)
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2023-02-26更新
|
702次组卷
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2卷引用:福建省福州第一中学2022-2023学年高二上学期期末数学试题
名校
2 . 如图,圆台
的轴截面为等腰梯形
,
,B为底面圆周上异于A,C的点.
内,过
作一条直线与平面
平行,并说明理由;
(2)设平面
∩平面
,
与平面QAC所成角为
,当四棱锥
的体积最大时,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e53b212640dadf751ef7f65a78a209.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b8c6d80251fdeabfebd65bca460d55b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f664c0db517bec6886ff0b6100fd474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc9ffc43a56921fe79f8602636b8b0f.png)
(2)设平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc9ffc43a56921fe79f8602636b8b0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0bd886276f8ff9df2a42013b337d726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29a0c82028e1259f300facd32775a15e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52c6c1f6d821af7e3c8058993218a861.png)
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2023-02-25更新
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2338次组卷
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8卷引用:福建省泉州市2022-2023学年高二上学期期末教学质量监测数学试题
3 . 四棱锥
中,底面ABCD为菱形,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/dee4ec98-9b52-4c1f-a667-423c61011330.png?resizew=185)
(1)求证:
:
(2)若
,平面PBC⊥平面ABCD,且
,求平面
与平面PBC的夹角大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6906f59d09ce31956d6f5ea2b23fc77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e226c46fea33dd1556bbb5970e823448.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/dee4ec98-9b52-4c1f-a667-423c61011330.png?resizew=185)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f94900d0fc083f27067134945791d64.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a916d31a199e250556fb7478d9f57f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
您最近一年使用:0次
名校
4 . 世界上有许多由旋转或对称构成的物体,呈现出各种美.譬如纸飞机、蝴蝶的翅膀等.在
中,
.将
绕着
旋转到
的位置,如图所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/988d1a8e-5371-4dac-b5fe-ca36ad4ba5ff.png?resizew=418)
(1)求证:
;
(2)当三棱锥
的体积最大时,求平面
和平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e239f048f2b3a121fa40d16a6fd3c6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0005e1ef60f6ddc5f9a83e3de1ef3b2e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/988d1a8e-5371-4dac-b5fe-ca36ad4ba5ff.png?resizew=418)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d72a007e3c4a134956b0e3fbde5f46.png)
(2)当三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4739afd7311501e948aa4e1e5c1cb17.png)
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2023-02-25更新
|
863次组卷
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3卷引用:福建省厦门市2022-2023学年高二上学期期末考试数学试题
解题方法
5 . 正方体
中,E为线段
的中点,则直线
与平面
所成角的正弦值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e516121599c9fcc528121c00afcf52fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1167959ebbc724159e6181759b58658b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/26/a3f734c4-f1a2-419f-be09-5fb33d57bc42.png?resizew=165)
您最近一年使用:0次
2023-02-25更新
|
786次组卷
|
4卷引用:福建省厦门市2022-2023学年高二上学期期末考试数学试题
福建省厦门市2022-2023学年高二上学期期末考试数学试题吉林省长春博硕学校2023-2024学年高二上学期期初考试数学试题(已下线)专题01 空间向量与立体几何(2)(已下线)专题05用空间向量研究距离、夹角问题(2个知识点6种题型1个易错点1种高考考法)(1)
名校
解题方法
6 . 如图,四边形
为正方形,
,
平面
,
,点
在棱
上,且
,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/27/fc694c1e-46db-405a-a050-6d5519386d75.png?resizew=166)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f817dfa5aaaf4795e69ef1eb86e291fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed04b01505bbd8a4ac0bc12e46f23bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85444e7369a4ae8a1be9eb9e540a527e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a20f8726d0ae87a40cb07390085c28ca.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/27/fc694c1e-46db-405a-a050-6d5519386d75.png?resizew=166)
A.当![]() ![]() ![]() |
B.当![]() ![]() ![]() |
C.当![]() ![]() ![]() ![]() |
D.当![]() ![]() ![]() ![]() |
您最近一年使用:0次
2023-02-25更新
|
562次组卷
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4卷引用:福建省厦门市2022-2023学年高二上学期期末考试数学试题
福建省厦门市2022-2023学年高二上学期期末考试数学试题(已下线)第11讲 用空间向量研究距离、夹角问题11种常见考法归类-【暑假自学课】2023年新高二数学暑假精品课(人教A版2019选择性必修第一册)江西省上饶市第一中学2022-2023学年高二下学期第一次月考(3月)数学试题福建省泉州市永春第二中学2023-2024学年高二上学期12月月考数学试题
名校
解题方法
7 . 在平行六面体
中,
,
,则直线
与直线
所成角的余弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039bb320c94cfc536e39b1b487f07d6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a807add855918c2b59fe624b7dc5668.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
A.0 | B.![]() | C.![]() | D.1 |
您最近一年使用:0次
2023-02-25更新
|
550次组卷
|
3卷引用:福建省厦门市2022-2023学年高二上学期期末考试数学试题
福建省厦门市2022-2023学年高二上学期期末考试数学试题四川省成都市第七中学2023-2024学年高二上学期期末复习数学试题(一)(已下线)专题03空间向量及其运算的坐标表示(5个知识点4种题型1个易错点)(2)
名校
解题方法
8 . 在四棱锥
中,
底面
,底面
是边长为2的菱形,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/46f6f48b-a926-440d-9334-c6c4faf33ea1.png?resizew=159)
(1)求证:平面
平面
;
(2)直线
与平面
所成角为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/46f6f48b-a926-440d-9334-c6c4faf33ea1.png?resizew=159)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a26a7784c7419d8359fb119c8ecc03d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/334b0be972ebf5a46333c0c4369aa90a.png)
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2023-02-24更新
|
777次组卷
|
8卷引用:河北省邯郸市魏县第五中学2021-2022学年高二下学期6月期末数学试题
解题方法
9 . 如图,在三棱锥P-ABC中,底面是边长为4的正三角形,PA=2,
底面ABC,点E,F分别为AC,PC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/bb110af9-7e5f-49a0-a096-a7694d7b2ea4.png?resizew=163)
(1)求证:平面
平面PAC;
(2)在线段PB上是否存在点G,使得直线AG与平面PBC所成角的余弦值为
?若存在,确定点G的位置;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/bb110af9-7e5f-49a0-a096-a7694d7b2ea4.png?resizew=163)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e51838e395dfc9d9ef597d9e01f46272.png)
(2)在线段PB上是否存在点G,使得直线AG与平面PBC所成角的余弦值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e64e76a4c1e5934f51cdca2ffbc8313f.png)
您最近一年使用:0次
解题方法
10 . 如图,在四棱锥
中,
底面
,底面
为正方形,
,
为
上一点,且
,则异面直线
与
所成的角的大小为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15f09d99668496273bcd0958234aa2ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bf4832894665baedfda42021f5430a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/26ef6a8e-7272-4259-8251-ec6eeb088c84.png?resizew=165)
您最近一年使用:0次