如图,正四棱柱
中,
,点
在
上且
.
(1)证明:
平面
;
(2)求向量
和
所成角的余弦值.
![](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://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05931cb74b16f5afbf58f41dfa9abe3a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/14/0e600af3-17a5-404e-a5e3-d7fc8ecef2eb.png?resizew=115)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26d8a9d64ad3c8cba28840b41ed7837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926584088b939200d88e64318f2d4e6c.png)
(2)求向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a38dfb3f3d83fa111eb89009789e88b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cf10f4c357bc8374ba123a0fcd63d29.png)
15-16高二上·北京怀柔·期末 查看更多[2]
更新时间:2016-12-04 07:17:25
|
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】如图,在直三棱柱
中,底面
是边长为
的等边三角形,且
,
为
的中点,
是棱
上一动点(不包括端点).
![](https://img.xkw.com/dksih/QBM/2022/1/10/2891473245134848/2895932147384320/STEM/a13a7e08-794b-4405-be32-ec4d640d34d6.png?resizew=165)
(1)若
为
的中点,证明:
平面
;
(2)若
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d97f616f0f32beed421129cbbb4db8d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/2022/1/10/2891473245134848/2895932147384320/STEM/a13a7e08-794b-4405-be32-ec4d640d34d6.png?resizew=165)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69bcb3226e013650b7d8827c31dd41d0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c7e14e831eff03260470e3720617071.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.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2】如图,四边形
为矩形,平面
平面
,
,
,
,
,点
在线段
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/45508f4d-5618-4e60-8f75-796666d6f82e.png?resizew=163)
(1)求证:
平面
;
(2)若二面角
的余弦值为
,求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c674dc5024374f53920947c4cf4baf11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/058f36d315245b63a811d5c6f348c17b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84f78015d1cce755eae8a2db74106902.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0997165a34c3bf2a0afe890db2bb5289.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/45508f4d-5618-4e60-8f75-796666d6f82e.png?resizew=163)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a22d6b860f06fe23618b0d3de6768fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6ea6e7aec788b4a60aeabdb948a95c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
【推荐1】直三棱柱
中,
,
,
分别是
、
的中点,
,
为棱
上的点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/15/bdb54daa-64e2-4428-99ef-3985a5367028.png?resizew=163)
(1)证明:
;
(2)是否存在一点
,使得平面
与平面
所成锐二面角的余弦值为
?若存在,说明点
的位置,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe2010a4b6fb8908822754aca5231c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16bf3fab7903bf73e5be8f37cd71fa25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e1b2df25efcb6812f4ad70e9cd1d731.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2391c0e2fc44598610d519dacb778062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d3aad224c7a39f0ca496a62d57337d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5534ba448f65d4c1d52be222aace803a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/711c0fa22675f8c53f01a63f68cfaf3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0b669ef4514f24ee09adeff7f41238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/523d3646705fc80b4e4bc2af7ae13cba.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/15/bdb54daa-64e2-4428-99ef-3985a5367028.png?resizew=163)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf32c2ef87d583e2c0b6b301a1190d94.png)
(2)是否存在一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0b669ef4514f24ee09adeff7f41238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1a815eac748c3c4222d5de58e67b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a2cbcf1a679d701806db233b964e272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1694e2395aef476b9952f92ca72ba56f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0b669ef4514f24ee09adeff7f41238.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐2】如图,在四棱锥
中,
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e800b64fbd8e88227aa9fae21b17e1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
,
为
的中点.
(1)证明:
;
(2)若平面
与平面
夹角的余弦值为
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e800b64fbd8e88227aa9fae21b17e1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed5301520d835820f4184290d8aaf6b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9feb772f92b878092575f5f90ef98ac7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/27/e2752c58-c5be-4748-838b-d9da7ed4c458.png?resizew=109)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a4c75067e4a13eb00f34995663292d4.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c29c3bfdae2d4fbe8a8deaa572a2e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
【推荐3】如图,在长方体
中,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2021/9/22/2813709765795840/2815003993006080/STEM/0a0c9c5d-8d5b-455b-a3cb-5b915ae3bb38.png?resizew=323)
(1)证明:
;
(2)求点
到平面
的距离;
(3)求二面角
的平面角的余弦值.
![](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://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2021/9/22/2813709765795840/2815003993006080/STEM/0a0c9c5d-8d5b-455b-a3cb-5b915ae3bb38.png?resizew=323)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0fa81c1f81266b4ef3d471bc6bfc38d.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7977ab975efa6411cc17de39be70d9.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a882536bffd519098a3f5542a796c7b.png)
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解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,长方体
的棱长
,
,
,求:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/cd342f71-6595-42cf-805b-892f6b7a856a.png?resizew=171)
(1)异面直线
与
所成角的大小;
(2)点
到平面
的距离;
![](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/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/cd342f71-6595-42cf-805b-892f6b7a856a.png?resizew=171)
(1)异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e539f26ed5e0b20ff7220559324869a4.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7977ab975efa6411cc17de39be70d9.png)
您最近一年使用:0次
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适中
(0.65)
解题方法
【推荐2】在四棱锥
中,
平面
,四边形
为直角梯形,
,
,
,
,点
在
上,且
.
(1)求异面直线
与
夹角的余弦值;
(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/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/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c656a1d0532dd79ef1e61c807b7f6d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829018a6ca0aff95d89e3f7cd943274e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9090a6f25e8ff514fe7b2ae1b14d3e17.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/f4213d11-263d-4cfe-a5ff-5b92cdfcd0f9.png?resizew=130)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.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,在三棱锥
中,
平面
,点
,
分别是
和
的中点,设
,
,直线
与直线
所成的角为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/da20ea5a-6fa1-4c93-8ee6-e8cff6e2ddd2.png?resizew=167)
(1)求
的长;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6deecf9ccb7b7879455050633219e09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8318fac197efd590ebbe81c475605866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed8f7d3d7043d4b1eb98fc5c4e2fcd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/da20ea5a-6fa1-4c93-8ee6-e8cff6e2ddd2.png?resizew=167)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faa23fa14f624ad8212bda55d321362f.png)
您最近一年使用:0次