如图:在三棱锥
中,
,
是直角三角形,
,
,点
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/18/cde1be72-c486-42eb-b790-5c9fdae810c6.jpg?resizew=157)
(1)求证:
;
(2)求直线
与平面
所成角的大小;
(3)求二面角
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a88380b0c9c24b8181111e505473c103.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5021b04c31532a99b2ee0816a9f2d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16bab906d4fc26acb1a7f681a3bb2981.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c5b88ec996d2d117987e7303cefe4ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fcbceec52ae9468f15bc6846ad8c78b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/18/cde1be72-c486-42eb-b790-5c9fdae810c6.jpg?resizew=157)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7459863f058993e17b7dcf902053eccd.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f33997d5b4a0d9a3feafc1a075bc56.png)
2012·四川内江·二模 查看更多[5]
(已下线)2012届四川省内江市、广安市高三第二次模拟联考试题理科数学2017届福建连城县一中高三上期中数学(文)试卷河北省张家口市第一中学2019-2020学年高二上学期期中数学试题宁夏回族自治区石嘴山市平罗中学2019-2020学年高二上学期期中数学(理)试题新疆维吾尔自治区2023年普通高中学业水平考试数学试题(十)
更新时间:2016-12-05 02:07:55
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相似题推荐
解答题-证明题
|
适中
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【推荐1】在四棱锥
中,侧面
⊥底面
,底面
为直角梯形,
//
,
,
,
,
为
的中点.
(Ⅱ)若PC与AB所成角为
,求
的长;
(Ⅲ)在(Ⅱ)的条件下,求二面角F-BE-A的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4795ee1f96b430529934e2231b38885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639bec6242a4b3f7bfb4b7033a67328c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62974d34de3a12418d6b700420afd1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2682f3f3f0f72c893b99073bcac83ff2.png)
(Ⅱ)若PC与AB所成角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
(Ⅲ)在(Ⅱ)的条件下,求二面角F-BE-A的余弦值.
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【推荐2】如图,在正方体
中,
、
分别为
、
的中点.
![](https://img.xkw.com/dksih/QBM/2020/8/2/2519368901238784/2519707264319488/STEM/8f1bde06183f4a298502b0c007bd57d0.png?resizew=134)
(1)求证:
平面
;
(2)求直线
与直线
所成的角.
![](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/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/2020/8/2/2519368901238784/2519707264319488/STEM/8f1bde06183f4a298502b0c007bd57d0.png?resizew=134)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
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解题方法
【推荐1】如图,在四棱锥PABCD中,PA⊥底面ABCD,AD∥BC,AB=AC=AD=3,PA=BC=4.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/106ce499-be63-4ea1-95b1-532f8c2c5102.png?resizew=137)
(1)求异面直线PB与CD所成角的余弦值;
(2)求平面PAD与平面PBC所成锐二面角的余弦值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/106ce499-be63-4ea1-95b1-532f8c2c5102.png?resizew=137)
(1)求异面直线PB与CD所成角的余弦值;
(2)求平面PAD与平面PBC所成锐二面角的余弦值.
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【推荐2】请从下面两个条件中只任选一个,补充在下面的横线上,并作答.①
;②
与平面
所成的角为
.
如图,在三棱柱
中,
是边长为
的正三角形,
,平面
平面
,
是线段
的中点,__________.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/54c1d838-4052-4167-a068-25729ed01e66.png?resizew=174)
(1)求
与
所成角的余弦值;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e90dd13e9804010653b6dae413ad3d8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
如图,在三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1347b1707478d309af4287a00e852b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/54c1d838-4052-4167-a068-25729ed01e66.png?resizew=174)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44d136f8024b7fbc14d4a34f1339b06a.png)
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解题方法
【推荐1】如图,在平行六面体
中,
,
.记
,且以
作为空间的一个基底.求:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/a1f50e34-8e15-4598-961b-934c43b7d180.png?resizew=194)
(1)
;
(2)平面
的一个法向量
;
(3)直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/045fa2110bae8f8469c7fd3a3eeabf30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29325f51647dde45ffa565600d353d11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e6384363cb1da000a8a4f6290799f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c905b8837228f25772db72477afc0185.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/a1f50e34-8e15-4598-961b-934c43b7d180.png?resizew=194)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca50a558ea552aae4f597e66c014ea2b.png)
(2)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f1a8e551cba7ec9f451749f60e628d.png)
(3)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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【推荐2】如图甲,在直角梯形
中,
是
的中点,
是
与
的交点.将
沿
折起到
.的位置,如图乙.
(1)证明:
平面
.;
(2)若二面角
为直二面角,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/970b410966cf02386e787d89842edae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdfe7976bd3f16bfef5c6f1b4f20f23.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/16/a9fb3108-8a2a-4768-83a6-1083958d25df.png?resizew=348)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eddaf3f33bd9a99162c061c9dd99aee.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f70095df1e87e6c9452a767986367aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
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解题方法
【推荐1】如图甲,在矩形
中,
,
,
,
为边
上的点,且
.将
沿
翻折,使得点
到
,满足平面
平面
,连接
,
,如图乙.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/d16fb04f-4ba0-4a7b-850d-b6448a610225.png?resizew=352)
(1)求证:平面
平面
;
(2)求二面角
的正弦值的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b40d0d2f3cdd8981bb792ad87efb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21dee56b9f36ba8f76fe67b76383636b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f233b375753611ffa7a93c2c12ef5e28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/d16fb04f-4ba0-4a7b-850d-b6448a610225.png?resizew=352)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c44c1843ff6150ebc6aad3e34e477d2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1d934590b10316fed6ee4114481f7a.png)
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【推荐2】已知菱形ABCD与长方形ABEF所在平面互相垂直,M,G分别是EF,DC中点,
,
,
,N是AD上一动点(异于端点).
(2)求平面NMB与平面GMB所成角的余弦值的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0cee0f36dc452e58086832c0152b641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
(2)求平面NMB与平面GMB所成角的余弦值的取值范围.
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【推荐3】如图,在几何体
中,底面
是边长为2的正三角形,
平面
,
,且
是
的中点.
![](https://img.xkw.com/dksih/QBM/2021/11/12/2849700677296128/2854736996712448/STEM/c8ac534f-7086-40a8-9d0c-b0124277f4b3.png?resizew=216)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36723bd074d43a8c98d9bd416020042c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e7bcb2d8a6172fe504c2c63e3ebc1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2021/11/12/2849700677296128/2854736996712448/STEM/c8ac534f-7086-40a8-9d0c-b0124277f4b3.png?resizew=216)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/932a04304f2d4975955d4baabb2deeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee3d16c7bd3fa91ce2848206816eec2.png)
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