如图,四棱锥
的底面是边长为
的正方形,侧面
底面
,且
分别为棱
的中点.
(1)求证:
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d81cb4e40c23af346691d5489983252d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2107ed4c826d711675d3c5b23e1b2c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/eeb5fc1c-8179-4051-b200-f1231616e626.png?resizew=200)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50817ff14fb74ab1d509be07836699bd.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af29254fe60a392c249c5791279e9c8.png)
23-24高二上·重庆黔江·阶段练习 查看更多[3]
更新时间:2023-12-28 17:08:39
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】在四棱锥
中,侧面
为等边三角形,底面ABCD为直角梯形,
,
,
,
,E为线段AB的中点,过直线CE的平面与线段PA,PD分别交于点M,N.
![](https://img.xkw.com/dksih/QBM/2022/4/22/2963608780251136/2965210494214144/STEM/7813ebef-4599-4135-a3a9-1a92ddfa9263.png?resizew=185)
(1)求证:
;
(2)若直线PC与平面CEMN所成的角的余弦值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b377f22aafd3742ad860f77abaacef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e808897e0e659740988fb3311f610dc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb466d3d90e7d27f27c60c8beecd4444.png)
![](https://img.xkw.com/dksih/QBM/2022/4/22/2963608780251136/2965210494214144/STEM/7813ebef-4599-4135-a3a9-1a92ddfa9263.png?resizew=185)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e7784be0caa2ffb58bbebf81fa127c1.png)
(2)若直线PC与平面CEMN所成的角的余弦值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/642a7dd471434c923f76809dfa5ee183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037f00f51c64d7dde2d46517003bca65.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在多面体
中,四边形
和
都是直角梯形,
,
,
,
,
,点M为棱
上一点,平面
与棱
交于点N.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/a6e0d412-a4c4-4946-ac34-35d9c7965b81.png?resizew=163)
(1)求证:
平面
;
(2)求证:
;
(3)若平面
与平面
所成锐二面角的余弦值为
,求
的值.
![](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/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c11e72609ba0fbefe03c9f24165cbf11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a5ac569028b31bba43bcc48a3d0bc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96c630b155517f1788d7b999cab2494d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/141483c2cfc9d51b992bfcdea5ce7186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9926397d0839f1a02946828dc348a7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/a6e0d412-a4c4-4946-ac34-35d9c7965b81.png?resizew=163)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a38e6c6dfde2b19b6b47f35a439a06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8846776d5e269c36e88db246dc7a22b6.png)
(3)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9926397d0839f1a02946828dc348a7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fb24880b91198d8fc0ef639020c897a.png)
您最近一年使用:0次
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适中
(0.65)
名校
【推荐3】如图,在四棱锥
中,
底面
,底面
是正方形,
.
(1)求证:直线
平面PAC;
(2)求直线PC与平面PBD所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.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/0e7b6d04f024ca05cdfacc8ce9137c15.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/5/b7a25eb5-7efa-4fff-b6a6-0889aed5cf7b.png?resizew=160)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
(2)求直线PC与平面PBD所成角的正弦值.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐1】如图,在正四棱柱
中,已知
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/52c75ed0-d892-4c39-b191-d2b2c1c522f9.jpg?resizew=120)
(1)求异面直线
与直线
所成的角的大小;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fd676c41d2d644928f014b0fea4689.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/52c75ed0-d892-4c39-b191-d2b2c1c522f9.jpg?resizew=120)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae7f4612c548b1f72a964ddb291cd2e.png)
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解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】如图,在长方体
中,
,
,E为AB的中点.
![](https://img.xkw.com/dksih/QBM/2021/1/19/2639707585101824/2640406564626432/STEM/24a86765-830a-42be-90b0-47f806b304d2.png?resizew=244)
(1)证明:
;
(2)求点E到平面
的距离;
(3)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7d64fc81c857b124268609a8beb77b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://img.xkw.com/dksih/QBM/2021/1/19/2639707585101824/2640406564626432/STEM/24a86765-830a-42be-90b0-47f806b304d2.png?resizew=244)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0fa81c1f81266b4ef3d471bc6bfc38d.png)
(2)求点E到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7977ab975efa6411cc17de39be70d9.png)
(3)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2331bccb6ebf5b9fd639df994f575a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7977ab975efa6411cc17de39be70d9.png)
您最近一年使用:0次