19.
如右图所示,已知正方形
和矩形
所在的平面互相垂直,
,AF = 1,M是线段
的中点.
(1)求证:
平面
;
(2)求证:
平面
;
(3)求二面角
的大小.
如右图所示,已知正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4b93d7abcfc4c3df48f03aa969c17f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac480d8d9d7821b62a603cf5cfda236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c1f270df2479467e2c1e57ae58fddd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29092448ac803d5e0d26ad6a6f421199.png)
![]() |
9-10高二·重庆·期末 查看更多[1]
(已下线)重庆市西南师大附中2009—2010学年度下期期末考试高二数学试题(理科)
更新时间:2019-01-30 18:14:09
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相似题推荐
解答题-证明题
|
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【推荐1】在四棱锥
的底面ABCD中,
,
,
平面ABCD,O是AD的中点,且
.
(1)求证:
平面POC;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae1e04eeb4de72e5750dae77bcb6f88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4ab7e657f01bdfa235f8c4d6681d13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e126c16032892966489053f44b9048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f7d901449341de851c7de534e5f8a8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/4/158d1119-72b4-4317-8215-5cd0c83ea4c0.jpg?resizew=146)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307807ee10071bafbe922eb18d2517d7.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e08e91e2d13593716f26a4b18b18ab0.png)
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【推荐2】如图,在五面体
中,面
为正方形,面
面
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/2cb4bc8b-3345-4af2-be08-6fd6ae1c480a.png?resizew=186)
(1)求证:CD∥平面ABFE;
(2)若
,
,求平面
与平面
所成的锐二面角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac0ee6608ab3ae63b54cd3330d30b6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5663257819e5f0fcc7da5306fea7e37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c388d0a3f0a8d9fb0b9576d00af225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b7f93bcf621d7a3abd80bb3e3d64a6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/2cb4bc8b-3345-4af2-be08-6fd6ae1c480a.png?resizew=186)
(1)求证:CD∥平面ABFE;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4d3d4307b9f64d8c99f864941f37874.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5ada9bc9cd9d5bbfae5a31703f4387.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
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【推荐1】如图,正四棱柱
中,
,点
在
上且
.
![](https://img.xkw.com/dksih/QBM/2010/3/22/1569667865837568/1569667983998976/STEM/608bfad5-0fe0-4f12-99ae-13be9e3b3df1.png)
(Ⅰ)证明:
平面
;
(Ⅱ)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95196d4658088f565e495c005cfed5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2010/3/22/1569667865837568/1569667983998976/STEM/5d5623ff52fb4fedbf6583a9108ff378.png?resizew=29)
![](https://img.xkw.com/dksih/QBM/2010/3/22/1569667865837568/1569667983998976/STEM/75cdd033123041648241211fac5770cf.png?resizew=77)
![](https://img.xkw.com/dksih/QBM/2010/3/22/1569667865837568/1569667983998976/STEM/608bfad5-0fe0-4f12-99ae-13be9e3b3df1.png)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26d8a9d64ad3c8cba28840b41ed7837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926584088b939200d88e64318f2d4e6c.png)
(Ⅱ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/628d6fc46c651e0c783b81a123a7b229.png)
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【推荐2】如图,在三棱柱
中,
平面
,
是
的中点,
是边长为
的等边三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/1/c5fe72f7-4d03-45d8-8678-ab82e10147f0.png?resizew=142)
(1)证明:
.
(2)若
,求异面直线
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/1/c5fe72f7-4d03-45d8-8678-ab82e10147f0.png?resizew=142)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe6225c58a4722eb10ab7ba1885dd3f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
您最近一年使用:0次
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【推荐1】如图.在四棱锥
中,
,
,
平面ABCD,且
.
,
,M、N分别为棱PC,PB的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/7d248bad-19ee-48fa-b4c9-4d3b2beb319a.png?resizew=155)
(1)证明:A,D,M,N四点共面,且
平面ADMN;
(2)求直线BD与平面ADMN所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14ef00794953710748082bb89ce553e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a58a622e2b1a239f2f96aa1501e9799.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/7d248bad-19ee-48fa-b4c9-4d3b2beb319a.png?resizew=155)
(1)证明:A,D,M,N四点共面,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45fbffb9e2c7fa7c5006cde8da0cabe.png)
(2)求直线BD与平面ADMN所成角的正弦值.
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【推荐2】在四棱锥
中,底面
是边长为2的菱形,
,
底面
,点
、
分别是棱
、
的中点.
![](https://img.xkw.com/dksih/QBM/2021/5/29/2731424452386816/2782435606454272/STEM/2c62ddb25113405d81e9cfb6acac7f01.png?resizew=218)
(1)证明:
平面
;
(2)在线段
上是否存在点
,使得
与平面
所成最大角的正切值为
,若存在,请求出
点的位置;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2021/5/29/2731424452386816/2782435606454272/STEM/2c62ddb25113405d81e9cfb6acac7f01.png?resizew=218)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d6da9f598fecf6fcf41cd65b45cbe08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83042953e7f15e984b2da2ee9ca678d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/839c7616cd0d90265f4b2c9c021254fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
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【推荐3】在三棱锥
中,
,
,O是线段AC的中点,M是线段BC的中点.
![](https://img.xkw.com/dksih/QBM/2021/5/24/2727944968609792/2784140693921792/STEM/7f0072b1-4832-47a9-a859-3bed05792841.png)
(1)求证:PO⊥平面ABC;
(2)求直线PM与平面PBO所成的角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca9de4b28493cb6f8fc83cf294c5cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80137ee8af4684ce558242d8b3f1459.png)
![](https://img.xkw.com/dksih/QBM/2021/5/24/2727944968609792/2784140693921792/STEM/7f0072b1-4832-47a9-a859-3bed05792841.png)
(1)求证:PO⊥平面ABC;
(2)求直线PM与平面PBO所成的角的正弦值.
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