解题方法
1 . 如图,在长方体
中,底面是边长为1的正方形,侧棱长为2,且动点P在线段AC上运动.
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898566258982912/2915633491566592/STEM/2c0e3363-571e-49e7-937e-989ef604fadd.png?resizew=142)
(1)若Q为
的中点,求点Q到平面
的距离;
(2)设直线
与平面
所成角为
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898566258982912/2915633491566592/STEM/2c0e3363-571e-49e7-937e-989ef604fadd.png?resizew=142)
(1)若Q为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f921b462ee12ad5749ea45d75f609b7.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96c10cd9fe2cec68681f6246f23420f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f921b462ee12ad5749ea45d75f609b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7d5ef3a3d9a03be91135fc426d57cc.png)
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2 . 三棱锥
各棱长为2,E为AC边上中点.
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898566258982912/2915633491329024/STEM/01fa4459-1b18-4568-a4be-fd22eda5ec6f.png?resizew=176)
(1)证明:
面BDE;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898566258982912/2915633491329024/STEM/01fa4459-1b18-4568-a4be-fd22eda5ec6f.png?resizew=176)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d682fd0344452998187cb6d48de3dd1.png)
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名校
3 . 已知正方形
的面积为36,如图,
平面
,
,
,
与底面
所成角的正切值为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/7b4fabb0-36cc-4fd4-90e5-1e4ab5cfc8f2.png?resizew=210)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f010e8072a66a8f1bc73334885b42e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bc89d050f251967e9288b98268be439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/7b4fabb0-36cc-4fd4-90e5-1e4ab5cfc8f2.png?resizew=210)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/770d42343599d3f26f0e0de8d5849f52.png)
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4卷引用:安徽省安庆市怀宁县第二中学2022届高三上学期期末数学(理)试题
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4 . 已知边长为2的正方体
中,E,F分别为
,
的中点,则点B到平面AEF的距离为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/b0f44d90-4f1c-4d43-9ee5-9b441ba6a981.jpg?resizew=189)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/b0f44d90-4f1c-4d43-9ee5-9b441ba6a981.jpg?resizew=189)
A.![]() | B.![]() | C.![]() | D.![]() |
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6卷引用:浙江省温州市2021-2022学年高一下学期期末模拟数学试题(B卷)
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5 . 如图,在四棱锥
中,
平面ABCD,底面ABCD是直角梯形,其中
,
,
,
,E为棱BC上的点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/bb948eb9-7a33-4ac4-92c9-8bcf692cdad3.png?resizew=188)
(1)求证:
平面PAC;
(2)求二面角A-PC-D的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abfb2735e1683a6ae86b5b97a0032e4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab2c27eac56fffa4cd7dbe1dcdf1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b41744ec71119e7264ef9673a35805a8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/bb948eb9-7a33-4ac4-92c9-8bcf692cdad3.png?resizew=188)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
(2)求二面角A-PC-D的正弦值.
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解题方法
6 . 如图,在三棱锥
中,
.
![](https://img.xkw.com/dksih/QBM/2022/1/19/2897977919643648/2907734244777984/STEM/2c61f31c27ce4104ae2a0d927382538c.png?resizew=144)
(1)平面
平面
;
(2)点
是棱
上一点,
,且二面角
与二面角
的大小相等,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d979f16c56c39d9d108a827bd7242a9c.png)
![](https://img.xkw.com/dksih/QBM/2022/1/19/2897977919643648/2907734244777984/STEM/2c61f31c27ce4104ae2a0d927382538c.png?resizew=144)
(1)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2008b996728711d019c37519a327106e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78d07f36efcb9d203267d7c0409720cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02535e1a690ca111ca7a395a1bf48080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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7 . 已知
,则点
到平面
的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8521490417837bdff59bb1a3ea1f0565.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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4卷引用:湖南省名校联盟2021-2022学年高二上学期期末教学质量检测数学试题
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解题方法
8 . 在棱长为2的正方体
中,点M,N分别是棱BC和
中点,下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/1/19/2897947766087680/2904902934052864/STEM/be5b18e5-4dc9-4ff0-be69-5ff9a7496ceb.png?resizew=163)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/2022/1/19/2897947766087680/2904902934052864/STEM/be5b18e5-4dc9-4ff0-be69-5ff9a7496ceb.png?resizew=163)
A.![]() |
B.直线MN与平面![]() |
C.点N到面![]() ![]() |
D.平面AMN截正方体所得截面的面积为![]() |
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9 . 已知四棱锥
的底面
是正方形,且
,
,二面角
的大小为
,M,N分别是
的中点.
![](https://img.xkw.com/dksih/QBM/2022/1/18/2897048863039488/2904786635177984/STEM/fda93be2-b87d-4c7b-b5b4-e6f54719ae73.png?resizew=175)
(1)求直线
与平面
所成角的正弦值;
(2)在棱
上是否存在点G,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
平面
?若存在,求
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6933009c0119b0f380e303b5ef862d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45cafe187bef7a5aa6792e649933fffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bfae15acb0bb08e8d3f28cc204bff37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c73513f32d5320cd5dd8f2c066b234c5.png)
![](https://img.xkw.com/dksih/QBM/2022/1/18/2897048863039488/2904786635177984/STEM/fda93be2-b87d-4c7b-b5b4-e6f54719ae73.png?resizew=175)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ef796b46e68fe77b117ff0483d2370c.png)
(2)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1885efcff0b903e314057dd153578600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a80a32ac1a576ed6bd42f93824f0af4.png)
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解题方法
10 . 如图,在四棱锥
中,底面ABCD为直角梯形,
,
,
底面ABCD,E为BP的中点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/aeba527a-e25e-4f22-94e9-6f3a56c4455a.png?resizew=137)
(1)证明:
平面PAD;
(2)求平面EAC与平面PAC夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d6ee72557cb3c3830212d74bca615a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/aeba527a-e25e-4f22-94e9-6f3a56c4455a.png?resizew=137)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356f46276f25c78bab48c1f9447a2a78.png)
(2)求平面EAC与平面PAC夹角的余弦值.
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