1 . 如图,正四棱锥(底面为正方形,顶点在底面的射影为底面正方形的中心)P-ABCD中,
,点E为PB中点,若CE与PD所成的角余弦值为
,则四棱锥P-ABCD的体积为( )
![](https://img.xkw.com/dksih/QBM/2022/2/23/2922734397734912/2926951012237312/STEM/d8a6555e65e344e18c028d05e3b7c348.png?resizew=115)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://img.xkw.com/dksih/QBM/2022/2/23/2922734397734912/2926951012237312/STEM/d8a6555e65e344e18c028d05e3b7c348.png?resizew=115)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2022-03-03更新
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1219次组卷
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7卷引用:百师联盟2022届高三下学期2月开年摸底联考全国卷1理科数学试题
名校
解题方法
2 . 直线a与平面
所成的角为15°,点P为空间一定点,过点P作与
成45°、与a成60°的直线l可以作( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
A.2条 | B.3条 | C.4条 | D.无数条 |
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3 . 如图,四棱锥
的外接球的球心为
,其中底面
为正方形,若平面
过球心
,且
,
,则异面直线
,
所成角的余弦值为( )
![](https://img.xkw.com/dksih/QBM/2022/2/12/2914638771863552/2924760169103360/STEM/f5ef765c-b195-4f6d-8258-93d6c4e77d55.png?resizew=175)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c7c7d72503e7cc3d1a5080a2f0d2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ea4ecdd5e0a786af56f4d73856b19f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2022/2/12/2914638771863552/2924760169103360/STEM/f5ef765c-b195-4f6d-8258-93d6c4e77d55.png?resizew=175)
A.![]() | B.![]() | C.![]() | D.![]() |
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2022-02-26更新
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414次组卷
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2卷引用:1号卷·A10联盟2022届高三下学期开年考文科数学试卷
解题方法
4 . 如图,在长方体
中,
,点E为棱BC上靠近点C的三等分点,点F是长方形
内一动点(含边界),且直线
,EF与平面
所成角的大小相等,则下列说法错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/6/7e817a3b-039d-4b50-9beb-17f4f79d987f.png?resizew=175)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1baa492b87c78b80b9a58e24e67fc50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fc725182c2fd1413319fea35b95c7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/6/7e817a3b-039d-4b50-9beb-17f4f79d987f.png?resizew=175)
A.![]() ![]() | B.三棱锥![]() |
C.存在点F,使得![]() | D.线段![]() ![]() |
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2022-11-05更新
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853次组卷
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3卷引用:安徽省亳州市2020-2021学年高一上学期期末数学试题
5 . 在正四面体
中,点
是
的中点,则
与
所成角的正弦值为( )
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
解题方法
6 . 已知
为正方体,P,Q,R分别为棱
的中点,则①
平面
;②
平面
;③
;④
平面
,上述四个结论正确的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a67eed1d223c0567a8c104d709ceba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307807ee10071bafbe922eb18d2517d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08361173b096d18b33210a955e109f42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f81fa367ec317fe2a30142e1c30cce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08361173b096d18b33210a955e109f42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a350c77735e8e92983f8dd2e7776e12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4645450a006f2c20087486d0833afbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08361173b096d18b33210a955e109f42.png)
A.1 | B.2 | C.3 | D.4 |
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7 . 在正方体
中,异面直线BD与
所成角的正弦值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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8 . 如图在直三棱柱
中,
为等腰直角三角形,且
,则异面直线
与
所成角的余弦值为( )
![](https://img.xkw.com/dksih/QBM/2022/1/16/2895617439596544/2908472550268928/STEM/344c6c28-7e53-4d6d-ac42-6c4ec95cbd13.png?resizew=139)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93077982faf30e933efc3a3507b3c9f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://img.xkw.com/dksih/QBM/2022/1/16/2895617439596544/2908472550268928/STEM/344c6c28-7e53-4d6d-ac42-6c4ec95cbd13.png?resizew=139)
A.![]() | B.![]() | C.![]() | D.![]() |
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9 . 如图,圆锥的底面直径
,其侧面展开图为半圆,底面圆的弦
, 则异面直线
与
所成角的余弦值为( )
![](https://img.xkw.com/dksih/QBM/2022/1/23/2900763415552000/2908604691496960/STEM/0b54bf39e0934cdf9274607db13076cc.png?resizew=158)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://img.xkw.com/dksih/QBM/2022/1/23/2900763415552000/2908604691496960/STEM/0b54bf39e0934cdf9274607db13076cc.png?resizew=158)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2022-02-03更新
|
939次组卷
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4卷引用:安徽省马鞍山市2021-2022学年高三上学期一模理科数学试题
安徽省马鞍山市2021-2022学年高三上学期一模理科数学试题安徽省马鞍山市2021-2022学年高三上学期一模文科数学试题(已下线)易错点14 立体几何中的角-备战2022年高考数学考试易错题(全国通用)(已下线)理科数学-2022年高考押题预测卷03(全国乙卷)
解题方法
10 . 在长方体
中,
和
与底面所成的角分别为30°和45°,异面直线
和
所成角的余弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e539f26ed5e0b20ff7220559324869a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e539f26ed5e0b20ff7220559324869a4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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