如图,在四棱锥P-ABCD中,底面ABCD为矩形,PD⊥平面ABCD,
,
,点E在线段AB上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/15/3098be5e-6a1a-4a9f-b50c-4b0d2eb57466.png?resizew=170)
(1)求证:CE⊥平面PBD;
(2)求二面角P-CE-A的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b610c9b9948d88eda8de0fb8d1cf972.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5405438dc935b2530eb3e9990c727ca0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/15/3098be5e-6a1a-4a9f-b50c-4b0d2eb57466.png?resizew=170)
(1)求证:CE⊥平面PBD;
(2)求二面角P-CE-A的余弦值.
2023·上海闵行·二模 查看更多[3]
更新时间:2023-04-14 11:53:11
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】如图,在直三棱柱
中,
,
,
分别为线段
,
及
的中点,
为线段
上的点,
,
,
,三棱柱
的体积为240.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/5/2b0e3b74-1ffa-427b-beb2-cde0caceb939.png?resizew=161)
(1)试确定动点
的位置,使直线
与直线
互相垂直.
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.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/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1859959fdb4c5edd8056893f94a10a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4a7ba4f5d1f60a959156cbded3d0bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/5/2b0e3b74-1ffa-427b-beb2-cde0caceb939.png?resizew=161)
(1)试确定动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c2293f93791a597bf0162411f3395f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd7cc5d9199856cb62ac8898664c931.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】在四棱锥
中,
底面
,
为等腰梯形,
,
,
.
;
(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/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/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e328ff490d0ca18aa10445c3586c185.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccbd1316b9d1f0c1e71fd078deec61f6.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33b7213d99a817bff19bcf740a0697c.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐3】如图,在四棱锥
中,四边形ABCD为直角梯形,
,
,
底面ABCD,且
,
,M为PD的中点.
![](https://img.xkw.com/dksih/QBM/2021/1/7/2631114962952192/2633140889739264/STEM/1d437642b9b746cb9abc7dd98985a672.png?resizew=229)
(1)求证:
平面PAB;
(2)求证:
平面PAC;
(3)求三棱锥
的体积.
![](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/c3b10835116b9b777a666b438c907b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829018a6ca0aff95d89e3f7cd943274e.png)
![](https://img.xkw.com/dksih/QBM/2021/1/7/2631114962952192/2633140889739264/STEM/1d437642b9b746cb9abc7dd98985a672.png?resizew=229)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5865d488a9cf1181016fd2e866177cdd.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae1de3f5eb55a078a2dc8d2a585b86a.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,在四棱锥P-ABCD中,PA⊥底面ABCD,BC
AD,AB⊥BC,PA=AB=
AD=2BC=2,M是PD的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/58473167-b899-4173-bb11-b41d49f50246.png?resizew=161)
(1)求证:CM
平面PAB;
(2)求三棱锥P-ACM的体积;
(3)求二面角M-AC-D的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58db0e1f4ae4ed44ae8ad87a09b27a98.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/58473167-b899-4173-bb11-b41d49f50246.png?resizew=161)
(1)求证:CM
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
(2)求三棱锥P-ACM的体积;
(3)求二面角M-AC-D的余弦值.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】边长为
的菱形
,
,沿对角线
对折,使平面
与平面
垂直,记点
折起后对应的点为
,点
和点
分别为
和
的重心.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/3325dbb8-a92e-4c69-819d-458250742d0d.png?resizew=298)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6906f59d09ce31956d6f5ea2b23fc77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ea25ef38e4afa8f75ffd0842890289.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/3325dbb8-a92e-4c69-819d-458250742d0d.png?resizew=298)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9abe6e8d1f4f1e8bdc46ddbae0cd789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/435ed11f005d065b3bdabc02b1eb129b.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b454cefba85e73c8fed073500973e7b4.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐3】如图,在直三棱柱ABC—A1B1C1中,
,AA1=4,AB⊥AC,BE⊥AB1交AA1于点E,D为CC1的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/15/1f0f804d-33c8-4029-aa77-97e6ca1f38c0.png?resizew=127)
(1)求证:BE⊥平面AB1C;
(2)求二面角C—AB1—D的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3e9ef3e849788645552cfb0735d987.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/15/1f0f804d-33c8-4029-aa77-97e6ca1f38c0.png?resizew=127)
(1)求证:BE⊥平面AB1C;
(2)求二面角C—AB1—D的余弦值.
您最近一年使用:0次