如图,在棱长为
的正方体
中,点
,
分别为棱
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/671dc9ac-13da-4ed2-807a-541700c7ddc9.png?resizew=167)
(1)求直线
与直线
间的距离:
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/671dc9ac-13da-4ed2-807a-541700c7ddc9.png?resizew=167)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/456175ea34492f0bc025aaab668fa659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7850e88507969a07a9515347b97c7b6e.png)
更新时间:2022-11-25 10:39:41
|
相似题推荐
解答题-问答题
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(0.85)
名校
【推荐1】设
,
分别是两个不同平面
,
的法向量,根据下列条件判断平面
,
的位置关系.
(1)
,
;
(2)
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/485e4833e2bf56741c1f25cad0b6a392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbda256c4b0a5e29212742f5b9f2499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e80ec4dbd7a3dc88fe2d7e99e82a9be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd292234fb1f4a98c1107fa52d25f5c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a2a61d89a409f398249dbddd5dbc569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4c5e765a094b50d6289c9d4565335ad.png)
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【推荐2】如图所示,在平行六面体
中,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/12/28/2882258703392768/2887905196834816/STEM/bea75d5f47ee4c718f383b127d4ebe07.png?resizew=183)
(1)求
;
(2)求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27db558e8db4c957654c8e5cecd2d2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd21a4e45dc1beb069d7e78f84a51544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0ce06dbe9e1177468781ba4aff85ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b735c72cfb59b24ec9c4aae288942252.png)
![](https://img.xkw.com/dksih/QBM/2021/12/28/2882258703392768/2887905196834816/STEM/bea75d5f47ee4c718f383b127d4ebe07.png?resizew=183)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fafd08a9fb0f93d02352374fd96be43f.png)
(2)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c92b5799d12ea37de46d7c942ce7a9.png)
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【推荐1】已知
,
,
.
(1)写出直线BC的一个方向向量;
(2)写出平面ABC的一个法向量.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f6dcd362a44588747e88b206e7c5ca4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee736aec4313d04a5921ed7e5800b3b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be33cccea13d7b177b4727d41a06cb88.png)
(1)写出直线BC的一个方向向量;
(2)写出平面ABC的一个法向量.
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【推荐2】已知平面α经过三点A(1,2,3),B(2,0,-1),C(3,-2,0),求平面α的一个法向量.
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解题方法
【推荐1】如图,在四棱锥
中,
平面
,底面
是边长为2的正方形,
分别为
的中点.
(1)求直线
与平面
所成角的正弦值.
(2)求点
到面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7056b3186fa5bb6898fc0e7c8d465beb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589c3cc1f331dbb2248b0829039df7f3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/15/e717e25f-b4d3-4b8f-83f1-f913c07662e1.png?resizew=94)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
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解题方法
【推荐2】已知三棱锥
中,
平面
,
,
,
为
上一点且满足
,
,
分别为
,
的中点.
;
(2)求直线
与平面
所成角的大小;
(3)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e3a8229158b4d79b9221be2209a14a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6666efaef5a3aa3aae2e096ebac408b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ea7dcb6e94618da188f06a68a3306d.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03c5e1e4e2669563b22dcf05bfb9b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70db40c42655327adee01caedfc9d50c.png)
(3)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70db40c42655327adee01caedfc9d50c.png)
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【推荐3】如图所示,直四棱柱
中,底面
为菱形,线段
与
交于点
,
为线段
的中点.
![](https://img.xkw.com/dksih/QBM/2021/1/13/2635401493012480/2637983809519616/STEM/76f25003-b922-4007-9939-111179ac930b.png?resizew=266)
(1)若点
在线段
上,且
,求证:
;
(2)若
,
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/2021/1/13/2635401493012480/2637983809519616/STEM/76f25003-b922-4007-9939-111179ac930b.png?resizew=266)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab199a373de701d423a58cdba8cdd075.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70c3675c2acd916e51e2cfc05130ef17.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87d25d2d84a1fd18fa587da7f7420d65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e918b70b02a73685e3c536c7f380e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90c780dac29ff8b7df5881d3b33abab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
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【推荐1】设两条直线的方程分别为
和
,已知
是方程
的两根,且
,求这两条直线之间的距离的最大值和最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cdcd0a3e9bf1e81a1afc217bbe372dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ea15bf5dd1280f6d5c39b03c44c4443.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af32cf97a32e55d61822cc497525d508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b55ecc097f996555263fd98489896b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ce2796180d7c94ae31a6dc878b95ca0.png)
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解题方法
【推荐2】已知直线
和直线
,其中
为常数.
(1)当
时,求直线
与
的距离;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2b0828f17a9e54bc825cfe9fd625cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e1b471a286791c55c6cd92b3eef337d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce08b357f11ef44c3e8207ac574422a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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