11-12高二上·广东·期中
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解题方法
1 . 如图,在三棱锥P﹣ABC中,E,F分别为AC,BC的中点.
(1)求证:EF∥平面PAB;
(2)若平面PAC⊥平面ABC,且PA=PC,∠ABC=90°,求证:平面PEF⊥平面PBC.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/14/00199af2-9023-45c7-afc6-8b6f3d2bf55e.png?resizew=158)
(1)求证:EF∥平面PAB;
(2)若平面PAC⊥平面ABC,且PA=PC,∠ABC=90°,求证:平面PEF⊥平面PBC.
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2016-12-04更新
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9卷引用:2015-2016学年湖南省邵阳市邵东县高一上学期期末数学试卷
2015-2016学年湖南省邵阳市邵东县高一上学期期末数学试卷(已下线)2011-2012学年度广东省东山中学高二第一学期期中理科数学试卷(已下线)2011-2012学年福建省福安一中高一下学期第一次月考数学试卷(已下线)2011-2012学年江西省会昌中学高一下学期第二次月考文科数学试卷(已下线)2018年11月25日 《每日一题》人教必修2-每周一测浙江省嘉兴市南湖区第一中学2019-2020学年高二上学期期中数学试题山东省泰安市2020-2021学年高一下学期期末数学试题山东省东营市广饶县第一中学三校区2022-2023学年高二9月月考数学试题山东省临沂市蒙阴县第一中学2022-2023学年高一下学期第二次月考数学试题
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2 . 如图,
是圆O的直径,
是圆周上不同于
的任意一点,
平面
,则四面体
的四个面中,直角三角形的个数有______ 个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/19/cd862289-b7f0-48bb-9cc6-5f6efeec35de.png?resizew=154)
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2016-12-04更新
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4卷引用:2015-2016学年湖南省湘阴县一中高一上学期第三次月考数学试卷
3 . 如图,三棱柱
中,侧棱
底面
,底面三角形
是正三角形,
是
中点,则下列叙述正确的是
![](https://img.xkw.com/dksih/QBM/2016/3/21/1572549923749888/1572549929828352/STEM/15af3bf963124030a3bddf2972dfc2d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfb9aaf34294bd0ebeac2df1449819cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19434b67703318b18be7efee7be590bd.png)
![](https://img.xkw.com/dksih/QBM/2016/3/21/1572549923749888/1572549929828352/STEM/ef3f2bc9aaa345c897f20d8879ef2036.png)
![](https://img.xkw.com/dksih/QBM/2016/3/21/1572549923749888/1572549929828352/STEM/ef3f2bc9aaa345c897f20d8879ef2036.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2016/3/21/1572549923749888/1572549929828352/STEM/15af3bf963124030a3bddf2972dfc2d2.png)
A.![]() ![]() |
B.![]() ![]() |
C.![]() |
D.![]() |
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2016-12-04更新
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5卷引用:2015-2016学年湖南省湘阴县一中高一上学期第三次月考数学试卷
4 . 如图,在正方体ABCD﹣A1B1C1D1中,E、F分别为棱AB、AD的中点.
![](https://img.xkw.com/dksih/QBM/2016/3/16/1572540956090368/1572540962193408/STEM/e2c037946ba144a481dde9b95aeff64b.png)
(1)求证:EF平行平面CB1D1;
(2)求证:平面CAA1C1⊥平面CB1D1
(3)求直线A1C与平面ABCD所成角的正切值.
![](https://img.xkw.com/dksih/QBM/2016/3/16/1572540956090368/1572540962193408/STEM/e2c037946ba144a481dde9b95aeff64b.png)
(1)求证:EF平行平面CB1D1;
(2)求证:平面CAA1C1⊥平面CB1D1
(3)求直线A1C与平面ABCD所成角的正切值.
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5 . 如图,四棱锥
中,平面
底面
.
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573024533372928/1573024539729920/STEM/f9f740d77b214c7bad9e2d042076a5b2.png)
(1)证明:
;
(2)若
与
所成角的余弦值为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6153163fecdf3f410411048428ccaef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba9008f244e609ad267e10b8861c8254.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67739bc45042e40299f35738a123cd56.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573024533372928/1573024539729920/STEM/f9f740d77b214c7bad9e2d042076a5b2.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a72f112046d8a63ad1f4dc50a799869.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90a724807b50a99a9b7b83720544e61d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e468f168f3657d84d44be5eb89a62d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c17e554cb3bf737dbdbc66b7410d5eff.png)
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2016-12-04更新
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2卷引用:2016届湖南宁远县一中高三下学期模拟考试数学(理)试卷
6 . 已知四棱锥P-ABCD的三视图如下图所示,E是侧棱PC上的动点.
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572957322633216/1572957328752640/STEM/e88ce08aa26048b1979f0fbf6f8af970.png)
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572957322633216/1572957328752640/STEM/2b50450df6ae4efda1da893d91d9db02.png)
(1)求证:BD⊥AE
(2)若点E为PC的中点,求二面角D-AE-B的大小.
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572957322633216/1572957328752640/STEM/e88ce08aa26048b1979f0fbf6f8af970.png)
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572957322633216/1572957328752640/STEM/2b50450df6ae4efda1da893d91d9db02.png)
(1)求证:BD⊥AE
(2)若点E为PC的中点,求二面角D-AE-B的大小.
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2016-12-04更新
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7卷引用:2015-2016学年湖南醴陵二中、四中高二上期末理科数学卷
7 . 如图,四棱锥
的底面
是正方形,
底面
,
,
、
分别是棱
、
的中点.
![](https://img.xkw.com/dksih/QBM/2016/3/14/1572534513819648/1572534520004608/STEM/9f29458ee24d43e6aabf1f43063cc326.png)
(1)求证:
;
(2)求直线
与平面
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6153163fecdf3f410411048428ccaef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/551e4cd76a93de89ea2750160fe74923.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f6967901d6c855864df01e7bf7a15c.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/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2016/3/14/1572534513819648/1572534520004608/STEM/9f29458ee24d43e6aabf1f43063cc326.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2016/3/14/1572534513819648/1572534520004608/STEM/1d30307d09334a3a879a49088c82ca24.png)
(2)求直线
![](https://img.xkw.com/dksih/QBM/2016/3/14/1572534513819648/1572534520004608/STEM/469e953dbd414ea8a50903cbe638462f.png)
![](https://img.xkw.com/dksih/QBM/2016/3/14/1572534513819648/1572534520004608/STEM/970d62641bcc437c8a051678a533b73f.png)
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8 . 如图,PA⊥平面ABCD,矩形ABCD的边长AB=1,BC=2,E为BC的中点.
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572504172838912/1572504178417664/STEM/d7a3de2dbf2043de818615ec43e0c0d4.png)
(1)证明:PE⊥DE;
(2)如果异面直线AE与PD所成的角的大小为
,求PA的长及点A到平面PED的距离.
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572504172838912/1572504178417664/STEM/d7a3de2dbf2043de818615ec43e0c0d4.png)
(1)证明:PE⊥DE;
(2)如果异面直线AE与PD所成的角的大小为
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572504172838912/1572504178417664/STEM/bd453d5bde1f437097494d22c55565b0.png)
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9 . 如图
是⊙
的直径,点
是弧
上一点,
垂直⊙
所在平面,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503588536320/1572503594729472/STEM/a1c3719ab1194c8ea93d1f41cdf5afe4.png)
(1)求证:
平面
;
(2)若
,⊙
的半径为
,求点
到平面
的距离.
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503588536320/1572503594729472/STEM/64178eb09621428cb9e5ac00059c565d.png)
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503588536320/1572503594729472/STEM/bee6d620cc874c83b331dc211d1df500.png)
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503588536320/1572503594729472/STEM/cefbdea42fe44584819c034cb6beeae0.png)
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503588536320/1572503594729472/STEM/64178eb09621428cb9e5ac00059c565d.png)
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503588536320/1572503594729472/STEM/ff5fb47506ed4f0faebc40ccdf30750c.png)
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503588536320/1572503594729472/STEM/bee6d620cc874c83b331dc211d1df500.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503588536320/1572503594729472/STEM/b07b63dc6c5b4f59919b8b98747450b3.png)
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503588536320/1572503594729472/STEM/ff5fb47506ed4f0faebc40ccdf30750c.png)
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503588536320/1572503594729472/STEM/a1c3719ab1194c8ea93d1f41cdf5afe4.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503588536320/1572503594729472/STEM/4e9efb1cd28e42b9842cd9756f7c4353.png)
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503588536320/1572503594729472/STEM/d2c53d1fe65b41dda72e3fd74644a1bf.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503588536320/1572503594729472/STEM/c4f164531c5e46ee8e4f2918db5deb20.png)
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503588536320/1572503594729472/STEM/bee6d620cc874c83b331dc211d1df500.png)
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503588536320/1572503594729472/STEM/d7e6b4a7fa924d438eba66e942f48721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503588536320/1572503594729472/STEM/cc0a45f7a1d24b529af31116b51a4e69.png)
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10 . 如图,四棱锥
中,
,
,
与
都是等边三角形.
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503398604800/1572503404331008/STEM/703f842a492c4f8da437e016036940ad.png)
(1)证明:
;
(2)求二面角
的余弦值.
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503398604800/1572503404331008/STEM/39b1548bc786425181f8c4c41891fde8.png)
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503398604800/1572503404331008/STEM/9b7bdf62c52044dcbab38276958febc7.png)
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503398604800/1572503404331008/STEM/7676ab866f124d5d98b13513764f288d.png)
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503398604800/1572503404331008/STEM/77b71099d27941a7b1c0dffb7abc5bfe.png)
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503398604800/1572503404331008/STEM/39d4ac3aa7e14f0b864b358ffe101767.png)
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503398604800/1572503404331008/STEM/703f842a492c4f8da437e016036940ad.png)
(1)证明:
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503398604800/1572503404331008/STEM/037865176b304f5081e4349b2e97c666.png)
(2)求二面角
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572503398604800/1572503404331008/STEM/55975542dc46441ab9e46ef5dd435a4c.png)
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