(注意:在试题卷上作答无效)
如图,直角△BCD所在的平面垂直于正△ABC所在的平面,PA⊥平面ABC,
,E为DB的中点.
(Ⅰ)证明:AE⊥BC;
(Ⅱ)若点
是线段
上的动点,设平面
与平面
所成的平面角大小为
,当
在
内取值时,求直线PF与平面DBC所成的角的范围.
如图,直角△BCD所在的平面垂直于正△ABC所在的平面,PA⊥平面ABC,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bd0a1e0b93cedf080012ca1419908fc.png)
(Ⅰ)证明:AE⊥BC;
![](https://img.xkw.com/dksih/QBM/2010/8/10/1569811319152640/1569811324067840/STEM/b9ff58d5-ba9c-4608-9338-d5521d5bc79c.png?resizew=171)
(Ⅱ)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5542d8ba7c5d294f64bd63ec4f43f4d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64eb31601464364be2baf4aa87404bcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de694144e7993d8a34e6c5d98664d031.png)
2010·湖北黄冈·二模 查看更多[2]
更新时间:2016-11-30 07:32:13
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相似题推荐
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图所示,在三棱锥
中,
平面
,点
是线段
的中点.
![](https://img.xkw.com/dksih/QBM/2017/3/21/1648567439196160/1652353235632128/STEM/573f8614d3c343c79af9a666852b92ea.png?resizew=132)
(1)如果
,求证:平面
平面
;
(2)如果
,求直线
和平面
所成的角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a31184af49d62faa99202bf3d73880e.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/2017/3/21/1648567439196160/1652353235632128/STEM/573f8614d3c343c79af9a666852b92ea.png?resizew=132)
(1)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d79e7020414add95907e061df505ef0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39282bdf319f30d7bc261e2e3ab3b1e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7359cc0656d98b2e44384aef3bd6855f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
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解答题-问答题
|
适中
(0.65)
名校
【推荐2】在长方体
中,
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/11/d5ff72ab-41a9-4ef7-9cbe-158a274cc6f8.png?resizew=122)
(1)求直线
与直线
所成的角的大小;
(2)求直线
与平面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/11/d5ff72ab-41a9-4ef7-9cbe-158a274cc6f8.png?resizew=122)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9399c9a2a31b0e3165aea2d6ccc4f7c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588eb9393564a33552c4b2e8de837ca5.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ef601ca1f9c4c031adab4ffed297f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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解答题-证明题
|
适中
(0.65)
【推荐3】如图1,有一边长为2的正方形ABCD,E是边AD的中点,将
沿着直线BE折起至
位置(如图2),此时恰好
,点
在底面上的射影为O.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/4f4f45cf-6b46-47e0-8c14-9824fdffcef5.png?resizew=286)
(1)求证:
;
(2)求直线
与平面BCDE所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438bf2134641f9950932bd667188d63c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed8cae33b1ca8c9cd0e9595d26f4b4f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/4f4f45cf-6b46-47e0-8c14-9824fdffcef5.png?resizew=286)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48304e659b9fac4f0462fb4e5e5f74be.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
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解答题-问答题
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适中
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名校
【推荐1】如图,四棱锥
的底面是梯形,
,
,E为线段
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/a7ef0d8e-8603-4adb-b0ba-58bfc24d2a5e.png?resizew=192)
(1)证明:
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e529a9752a32b4343112db5c4c481a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c391e951ae9d11ee78d0747dfa158c8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/a7ef0d8e-8603-4adb-b0ba-58bfc24d2a5e.png?resizew=192)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ccdd87b7ea0667fb405c305c6a497a.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
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解题方法
【推荐2】如图,四面体
中,
,
,
,E为AC的中点,且平面
平面
,若
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/5ea340a5-a3ad-445d-b869-e142fc47f8de.png?resizew=176)
(1)证明:
;
(2)点
在
上,当
的面积最小时,求
与平面
所成的角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2aca1bdb9459855415e292e73de50ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8ff58f671a287701011a1b31e67e28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c646c683fbe522edb7ea54fd3ad873d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/5ea340a5-a3ad-445d-b869-e142fc47f8de.png?resizew=176)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36691f0269294ecae8f00b7bce97756c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
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解答题-证明题
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【推荐1】如图,在三棱柱
中,
,侧面
是正方形,
是平面
上一点,且
.
到直线
和
的距离相等.
(2)已知二面角
的大小是
,求直线AB与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fad3d50e1654611107e7b9cb11cc52bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfbad7ad1465d1c4c177e3321e6ed12a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
(2)已知二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea67423ce6963c0972867306169f17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f785147690f83dcee0a0bc6c327e75a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
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【推荐2】如图所示,正四棱锥
的斜高为a,其侧面与底面成60°,过
、
的中点E、F及顶点S作截面将棱锥分为两部分,求:
![](https://img.xkw.com/dksih/QBM/2021/9/24/2815046459441152/2815965048045568/STEM/61c8e94f2554420898115947cab8cb68.png?resizew=209)
(1)较小部分的体积;
(2)底面中心到截面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2021/9/24/2815046459441152/2815965048045568/STEM/61c8e94f2554420898115947cab8cb68.png?resizew=209)
(1)较小部分的体积;
(2)底面中心到截面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b156bc439fbaba3bfc9937beccb9b2.png)
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解答题-问答题
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适中
(0.65)
【推荐3】如图,在四棱锥
中,
平面
中,四边形ABCD是正方形,点E在棱SD上,
.
![](https://img.xkw.com/dksih/QBM/2021/12/22/2878072515813376/2878976483426304/STEM/9c48a2a563994563b5718e204192532d.png?resizew=242)
(1)证明:
;
(2)若正方形ABCD的边长为1,二面角
的大小为45°,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/166ac39e9b7ff52a66f89a66e2e2ac30.png)
![](https://img.xkw.com/dksih/QBM/2021/12/22/2878072515813376/2878976483426304/STEM/9c48a2a563994563b5718e204192532d.png?resizew=242)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7dac702fe64edf1bc265da4b98cf2a0.png)
(2)若正方形ABCD的边长为1,二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f4096ff62b4f29932cd8c6eef661a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
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