如图,在正方体
中,
,
分别为棱
,
的中点,则异面直线
与
所成角的余弦值为___________ ;直线
与平面
所成角的正弦值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a211ad5a06b505b8365a62c1946f3cb7.png)
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21-22高二上·云南大理·阶段练习 查看更多[2]
更新时间:2021-12-24 16:33:44
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【推荐1】正三棱柱
中,
,
,若
,
,则异面直线
,
所成角的正弦值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
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解题方法
【推荐2】如图1,菱形
的边长为
,
,将平面
、平面
同时绕BD向相对方向旋转,当A,C两点之间的距离等于BD时,构成四面体
,如图2所示,则BD与AC所成角的大小为________ ,四面体
外接球的表面积为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b91d650c2fc1a741fabdb333b09aeb6.png)
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解题方法
【推荐1】如图所示,在四边形
中,
,
,
,将四边形
沿对角线
折成四面体
,使平面
平面
,则下列结论正确的是_________ .
(1)
;
(2)
;
(3)
与平面
所成的角为
;
(4)四面体
的体积为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/832afec35b94e7f73af80164b2b81c9c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeb4c6e9a723aa843e6ba62d7c1a3a6c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b219a74a1ce5a2b22c36d8de1e21ff91.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910fab9c432cda7e4642535638046094.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a037b1a3ec2e37bbcb05d0a467efb511.png)
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(4)四面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeb4c6e9a723aa843e6ba62d7c1a3a6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e6486784415f3537c9a13556c05d893.png)
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【推荐2】如图,
,平面ABC外有一点
,点P到角的两边AC,BC的距离都等于
,则PC与平面ABC所成角的正切值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d81d732204a3c2384a27606f858677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f742da39a47389b3b390c0971f0eee02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dffc7d0a7c658b991af37443186b4e9.png)
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【推荐1】在正方体
中,O是BD的中点,点P在线段OB上移动(不与点O,B重合),异面直线
与
所成的角为
,则
的取值范围是_____ .
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解题方法
【推荐2】如图,正方体
的棱长为6,点
是棱
的中点,
与
的交点为
,点
在棱
上,且
,动点
(不同于点
)在四边形
内部及其边界上运动,且
,则直线
与
所成角的余弦值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
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【推荐1】如图在四棱锥
中,
平面
,
,
,
,
,
,E是直线
上的一个动点,则
与平面
所成角的最大值为________ .
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【推荐2】在等边三角形
中,
为
中点,将
沿
折起至
,使得
,则直线
与平面
所成角的正弦值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb961bd7db3adb76af2d4cedb611bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cc98ee0697f29b9088a87634f9ab28f.png)
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【推荐3】一个正方体的平面展开图如图所示.在该正方体中,以下命题正确的是___________ .(填序号)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/23/9cc3704c-04a7-4749-af05-1de991c088ce.png?resizew=220)
①
;
②
平面
;
③
与
是异面直线且夹角为
;
④
与平面
所成的角为
;
⑤二面角
的大小为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/23/9cc3704c-04a7-4749-af05-1de991c088ce.png?resizew=220)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfb0769fddbe87139fcfd9c3d467976c.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f09ad78d4eccd1a9c9ccd3c4af79c79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73153657848013d2a1c3247d7f84ddeb.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
⑤二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a309ee69f1b998fd5b866dcc7e69b90b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
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