在长方体
中,
,
,
是
的中点,以
为原点,
、
、
所在直线分别为
轴、
轴、
轴建立如图所示的空间直角坐标系.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/2420ea5e-83fe-4ba8-adb6-3428d24544de.png?resizew=210)
(1)求平面
与平面
夹角的余弦值;
(2)求点
到平面
的距离;
(3)向量
是否与向量
、
共面?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe236a434aa88e5633ea61574d1bed8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/2420ea5e-83fe-4ba8-adb6-3428d24544de.png?resizew=210)
(1)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7850e88507969a07a9515347b97c7b6e.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7850e88507969a07a9515347b97c7b6e.png)
(3)向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae74c1da83999e02862b1eb791c97be9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d021a5c98388463d577675e58068aa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a3cba8eef021b84253c375234e9ca6.png)
22-23高二上·北京大兴·期中 查看更多[3]
北京市大兴区2022-2023学年高二上学期期中检测数学试题辽宁省沈阳市东北育才双语学校2022-2023学年高二上学期期末数学试题(已下线)第五篇 向量与几何 专题18 空间点线面问题 微点1 空间点线面问题
更新时间:2022-11-03 22:25:28
|
相似题推荐
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,已知四棱锥
的底面是菱形,对角线
,
交于点
,
,
,
,
底面
,
,
分别为侧棱
,
的中点,点
在
上且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/16/791c1de8-e2aa-4482-908d-a347e465884c.png?resizew=159)
(1)求证:
,
,
,
四点共面;
(2)求直线
与平面
所成角的正弦值;
(3)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e3dfcd8aff269dd5aba398816490c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ba1df94176a1f769c7a0a12bf357fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/637331a6bcf269d7d3487ee4cfb536f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc6f007dbf1c1a36eb031e520608403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed30b73beeccafd4ec854237b33e1e2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/16/791c1de8-e2aa-4482-908d-a347e465884c.png?resizew=159)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
(3)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
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【推荐2】如图四棱锥
,且
,平面
平面
,且
是以
为直角的等腰直角三角形,其中
为棱
的中点,点
在棱
上,且
.求证:
四点共面.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66d8f4270ac3c1844288bb5cb82e81ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/694e6bc99d14c7d9105928d3a0ccf0c3.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/36aae82d53f2a35d2f95f467bd5b76cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34f4ea9203ad9cd37c444cf1867c8746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c3c11de81d6b7d9cb6b34f67aba11fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96b3d919fe28e81cc33c049bd4956647.png)
![](https://img.xkw.com/dksih/QBM/2023/11/14/3367848286707712/3369243855331328/STEM/8132d4941e6a4f5aaef3629c23250e31.png?resizew=140)
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(0.65)
名校
解题方法
【推荐1】如图四棱锥
,且
,平面
平面
,且
是以
为直角的等腰直角三角形,其中
为棱
的中点,点
在棱
上,且
.
(1)求证:
四点共面;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fadc61edaf191f304240a7ab7efd5444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/694e6bc99d14c7d9105928d3a0ccf0c3.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/36aae82d53f2a35d2f95f467bd5b76cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34f4ea9203ad9cd37c444cf1867c8746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c3c11de81d6b7d9cb6b34f67aba11fb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/9/6e7b30c4-9499-4101-beda-91c01da30c5a.png?resizew=140)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96b3d919fe28e81cc33c049bd4956647.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
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【推荐2】如图,在直三棱柱
中,
,点
为
上一点,且
平面
.
![](https://img.xkw.com/dksih/QBM/2023/5/31/3249535718957056/3298264834449408/STEM/65f896cbdcd64b16ac0456b61e035af4.png?resizew=160)
(1)求
的值;
(2)若三棱锥
的体积为
,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e64cabc69fb1e437b50acdbf43e60306.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/896e293411e2fd0da215ff20781cb36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62fd0b510920be6bc60d170c3ff3da3.png)
![](https://img.xkw.com/dksih/QBM/2023/5/31/3249535718957056/3298264834449408/STEM/65f896cbdcd64b16ac0456b61e035af4.png?resizew=160)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b70ff4d92d1fbda025816f88e63478a.png)
(2)若三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98bb4f21d1699d81097b3934ebc2acb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37fbbc8f521edab89a7e373287bcfbd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62fd0b510920be6bc60d170c3ff3da3.png)
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【推荐1】如图,四棱台
中,上、下底面均是正方形,且侧面是全等的等腰梯形,
,上、下底面中心的连线NM垂直于上、下底面,且NM与侧面所成角的正切值为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/d75c1d25-0990-47a9-9da3-5314c73b2da2.png?resizew=230)
(1)求点A到平面
的距离;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a0c3a4e61b97fa9bc58f3179fc2958.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a81d0c42925e4a75e7a6908e76634d0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/d75c1d25-0990-47a9-9da3-5314c73b2da2.png?resizew=230)
(1)求点A到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a31a143b0423aa181a0b77b417be8cb3.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49ed193bc6b44eaa247bf976e48860b.png)
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【推荐2】边长为2的正三角形ABC中,点D,E,G分别是边AB,AC,BC的中点,连接DE,连接AG交DE于点
现将
沿DE折叠至
的位置,使得平面
平面BCED,连接A1G,EG.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/c1bc926b-64bc-4a29-a493-59dfbb46c331.png?resizew=318)
证明:DE∥平面A1BC
求点B到平面A1EG的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9be9f2c8cc327ec0032d04a3e788ff69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefe4a3e7a7fa195ed6a6712447639b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd256471351a526d42ade802026d993a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b24f8448d58a398aa449ef0443c5fc73.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/c1bc926b-64bc-4a29-a493-59dfbb46c331.png?resizew=318)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
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