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解题方法
1 . 在如图所示的空间几何体中,平面
平面
与
均是等边三角形,
,
和平面
所成的角为
,且点
在平面
上的射影落在
的角平分线上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/8c9edf40-6ae2-48e1-ba4e-1488b63efc2e.png?resizew=194)
(1)求证:
平面
;
(2)求多面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17580410bf63dba4fe164265afaac4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e179513f9fdf253e425fd9a4d2c3528.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b40c2b0ab8e1cfe5112d428b4b829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f941c5fba24bdeea8da41495323103e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/8c9edf40-6ae2-48e1-ba4e-1488b63efc2e.png?resizew=194)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64515eca2696cc35da2b5c698768ec31.png)
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2 . 设
是两个不同的平面,m,n是两条不同的直线,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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2021-08-25更新
|
390次组卷
|
4卷引用:重庆实验外国语学校2022-2023学年高二上学期九月检测数学试题
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3 . 如图,在直四棱柱
中,底面
是边长为2的菱形,且
,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/12/0456cc4d-780c-4ec0-aaa7-75fb15f18c6f.png?resizew=137)
(1)证明:
平面
;
(2)若
,求二面角
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/e8d927585a17c2e98ef7d5a9589a26ac.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/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/12/0456cc4d-780c-4ec0-aaa7-75fb15f18c6f.png?resizew=137)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4cd2b33bd983a9ed6575b9de04a46a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f95ffa57b758ece1827087586090bf1.png)
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2021-04-17更新
|
1492次组卷
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9卷引用:重庆市杨家坪中学2022-2023学年高二上学期期末数学试题
重庆市杨家坪中学2022-2023学年高二上学期期末数学试题河南省周口市太康县第二高级中学2022-2023学年高二上学期11月月考理科数学试题河南省周口市太康县第二高级中学2022-2023学年高二上学期11月月考文科数学试题甘肃省2021届第二次高考诊断理科数学试题甘肃省2021届高三下学期二模试数学(理科)试题内蒙古通辽新城第一中学2021届高三第二次增分训练数学(理)试题吉林省松原市实验高级中学2021届高三5月月考数学试题(已下线)专题2.7 空间向量与立体几何-2021年高考数学解答题挑战满分专项训练(新高考地区专用)黑龙江省七台河市勃利县高级中学2022-2023学年高一下学期期末数学试题
4 . 如图,在平行四边形AMCN中,
,
,将
沿AD折起,使点N到达点E的位置,且
,将
沿BC折起,使点M到达点F的位置,且
.连接EF,AF,DF.
![](https://img.xkw.com/dksih/QBM/2021/1/30/2647183146139648/2651787650367488/STEM/fdbea2035c1b480784620daba77b3d02.png?resizew=493)
(1)证明:
平面ABCD;
(2)若
,
,求四棱锥F-ABCD体积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5486dd36cd13a5b7ad3ca3076b36e4d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0882294896d128e7b4505dcccc328f34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20d576d3824eaf583c67809124c6327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9874eca4abea481fa84eb772a920f9c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d011d6ad89d0b033f96c2efbb314d78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c230b2139256d8e4a7f964ccc8136d.png)
![](https://img.xkw.com/dksih/QBM/2021/1/30/2647183146139648/2651787650367488/STEM/fdbea2035c1b480784620daba77b3d02.png?resizew=493)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6402c0f9eecfcdf73f9e87ca82a6f2c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d735415b32e3e187a9ba11dd4361890.png)
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解题方法
5 . 如图,在三棱锥
中,
平面ABC,
,则下列结论正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d98fb567a88b263813d0381a5716890.png)
A.三棱锥![]() ![]() |
B.三棱锥![]() ![]() |
C.三棱锥![]() ![]() |
D.三棱锥![]() ![]() |
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2021-02-05更新
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1413次组卷
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3卷引用:重庆市九龙坡区2020-2021学年高二上学期期末数学试题
解题方法
6 . 直线
与曲线
有两个不同的交点,则实数k的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530943b9433ed5e507fc5ef099f3dd85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c31b7ff2dace2acd847c87516cb5db6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2021-02-05更新
|
250次组卷
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2卷引用:重庆市九龙坡区2020-2021学年高二上学期期末数学试题
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7 . 已知三棱锥
的四个顶点都在球
的球面上,
平面
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4f38c2ac9a794cdd9451d5b37792b9.png)
,则球
的表面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdd76cdbfc54bf3be1184c73e8438608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae358205bfe1dfdc8d1b9d6ecc4e2e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e04a2f09a6d56ce328f0fa843ef8fa89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4f38c2ac9a794cdd9451d5b37792b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cded932ee11777cf1b0561d01c3f677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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8 . 矩形ABCD,PD
平面ABCD,若PB=2,PB与平面PCD所成的角为
,PB与平面ABD成
,求:
![](https://img.xkw.com/dksih/QBM/2021/3/12/2676438710001664/2683962777108480/STEM/357275f3ca5a48b1a4ba117939a0fb9f.png?resizew=192)
(1)CD的长;
(2)求PB与CD所成的角
(3)求二面角C-PB-D的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://img.xkw.com/dksih/QBM/2021/3/12/2676438710001664/2683962777108480/STEM/357275f3ca5a48b1a4ba117939a0fb9f.png?resizew=192)
(1)CD的长;
(2)求PB与CD所成的角
(3)求二面角C-PB-D的余弦值.
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9 . 已知正四棱柱ABCD﹣A1B1C1D1中,AA1=2AB,E为AA1中点,则异面直线BE与CD1所成角的正切值为( )
A.![]() | B.![]() | C.3 | D.![]() |
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10 . 已知四边形
内接于圆
,且
,则圆心
到直线
的距离为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/402ea87ded0d9e5a3a4695ad8bc61e47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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