如图,设长方体
中,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/6/59a64f46-3e57-49f8-908a-5f89090b95bc.png?resizew=155)
(1)求异面直线
与
所成角的大小;
(2)求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1baa1c07becd03537beeb09a31745cf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/6/59a64f46-3e57-49f8-908a-5f89090b95bc.png?resizew=155)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18b42d91ade9933f47404dc8a74e55fa.png)
2022高三·全国·专题练习 查看更多[3]
更新时间:2022-11-06 16:00:23
|
相似题推荐
解答题-问答题
|
较易
(0.85)
名校
解题方法
【推荐1】如图,在直三棱柱
中,
,
分别为
的中点.以
为坐标原点,直线
分别为
轴、
轴、
轴建立空间直角坐标系
.
(1)设平面
的法向量为
,求
的值;
(2)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/944cf5d3b6e45274018a64ee79e6bdff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e74f5f49d056b9ab5020e6e454be2469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd035eb3c20dcbfbcb352a0c04ff6532.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://staticzujuan.xkw.com/quesimg/Upload/formula/301a2b8d5dba74d15e174673739f239e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/6/c2e32dca-0c00-44ad-969a-9629fa76ce14.png?resizew=151)
(1)设平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae80f09dae8acbe1e5e27bd5c4d8164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ad59939fd311c06a9e086118ae1c108.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
解题方法
【推荐2】已知点O是正△ABC平面外的一点,若OA=OB=OC=AB=1,E、F分别是AB、OC的中点,试求OE与BF所成角的余弦值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/1c03e54f-910c-4f37-87eb-1b1abee8aade.png?resizew=163)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
【推荐1】如图,已知
,
,
,平面
⊥平面
,
,
,F为
的中点.
![](https://img.xkw.com/dksih/QBM/2022/2/14/2916275919880192/2918849849344000/STEM/53240602-c560-4cd4-82fb-1516e08874a3.png?resizew=175)
(1)证明:
平面
;
(2)求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e22143a3f0cb2de51f382836cc274e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4340375ca8abdbd6998760c944f38d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/738a7bc24f39d08ba3752418055e1d1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/2022/2/14/2916275919880192/2918849849344000/STEM/53240602-c560-4cd4-82fb-1516e08874a3.png?resizew=175)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
解题方法
【推荐2】如图所示,已知在三棱柱
中,平面
平面
,
,
,
,
,
为
中点,
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/b6aa146b-5d17-4d2c-8f22-b29617832e58.png?resizew=212)
(1)试在线段
上找一点
,使
平面
;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50d9bdbbdfabc737323692c796e41930.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c7b42f530db0143b64c381b876ad801.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37750daa8ba3b3fe3e9e2092f81c848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6cde85d5c526cb591aa4507543178cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bef1e5b9e42036bc85d1f903378f3c43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/b6aa146b-5d17-4d2c-8f22-b29617832e58.png?resizew=212)
(1)试在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17e5e2ba78a5b1dd0f39bb65d2a0a0f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/568b3739e6cdcc146708d847092dc8e1.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ae4318e7924125b6249cd38eafc222.png)
您最近一年使用:0次