(本题满分12分如图,四边形
为矩形,且
,
,
为
上的动点.
![](https://img.xkw.com/dksih/QBM/2012/3/19/1570809704964096/1570809710477312/STEM/aa232f59b7e742848de97c7e540a86ce.png?resizew=175)
(1) 当
为
的中点时,求证:
;
(2) 设
,在线段
上存在这样的点E,使得二面角
的平面角大小为
.试确定点E的位置.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13da96a673bb7d70c301e333b4ca994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502a46021ff0bd64fc4cd3bad7d8a826.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/2012/3/19/1570809704964096/1570809710477312/STEM/aa232f59b7e742848de97c7e540a86ce.png?resizew=175)
(1) 当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/248ddfad39864ab0e183e01f82859e72.png)
(2) 设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc532cfe64300cb3da9e04a307c957a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5886e79804341c12481970b3a0f809a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
2012·全国·一模 查看更多[1]
(已下线)2012届新课标高三二轮复习综合验收(6)理科数学试卷
更新时间:2016-12-01 17:23:26
|
相似题推荐
解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】如图,在平行六面体
中,
,
,
分别在
,
,
上,且
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/20/062ed575-f8b4-4925-9160-71f9aaca259e.png?resizew=218)
(1)求证:
;
(2)若底面
,侧面
都是正方形,且二面角
的大小为120°,
,若
是
的中点,求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a696a182fff038a86b2bbe8ca099442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1859959fdb4c5edd8056893f94a10a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e3334853138fb74687d66b1e45f2fd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1586681cc763024b659b07dc4ccd02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62fe19c35d4797ea04374c89ee02f50a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6588678fefd6cc4aff670e5dea92376c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/20/062ed575-f8b4-4925-9160-71f9aaca259e.png?resizew=218)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31053dbf6775b0a983eeea10b4acddfc.png)
(2)若底面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e22ebcc4aa98d46366df48f751a5f368.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da1716ca1425c46de840747e089efd43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fec5bd77cfc1313bc200480cc66c766.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】如图,正方体
的棱长是
,
和
相交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/24/e1e9bc8b-c7e7-4f20-84fc-2c4c336a6717.png?resizew=146)
(1)求
;
(2)求
与
的夹角的余弦值
(3)判断
与
是否垂直.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e539f26ed5e0b20ff7220559324869a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2eb89294b31ffdd2680b4361e8994d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/24/e1e9bc8b-c7e7-4f20-84fc-2c4c336a6717.png?resizew=146)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1df1855bfa12d8aa6751780450be06dc.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef2723673c90347f6dd58346278c7fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a34bf00aeba15bce2cdee8ab487388dc.png)
(3)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef2723673c90347f6dd58346278c7fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d74ffe21e67d81dd25b6ab7b5cc30c08.png)
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解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,在直三棱柱
中,平面
⊥侧面
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/15/53940cc2-f6fc-42f2-b916-1a2dbeac07eb.png?resizew=153)
(1)求证:
;
(2)若直线
与平面
所成的角为
,请问在线段
上是否存在点
,使得平面
与平面
的夹角为
,若存在请求出
的位置,不存在请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4339a40ae9d1947ec3a4b3e2fa3a16cd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/15/53940cc2-f6fc-42f2-b916-1a2dbeac07eb.png?resizew=153)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037fb348109dc2063a268b10eb925a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13b2ef1b525d302da087241e37387fa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】已知三棱锥
的底面
是边长为2的等边三角形,
平面
,
,点
为线段
上一动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/b7a77917-20e7-476c-b988-057b75662ce3.png?resizew=166)
(1)当点
为
中点时,证明:
;
(2)当平面
与平面
所成二面角为
时,试确定点
的位置.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/e93e1661d70eca6d7eb848b667e388e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/b7a77917-20e7-476c-b988-057b75662ce3.png?resizew=166)
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d3f843b83e62bab294988a7ea134a63.png)
(2)当平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3653ada76ba0c8afe9d57c8e7832c6ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次