名校
1 . 如图,甲站在水库底面上的点
处,乙站在水坝斜面上的点
处,从
,
到直线(库底与水坝的交线)的距离
和
分别为
和
,
的长为
,甲乙之间拉紧的绳长为
,则库底与水坝所在平面夹角的余弦值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://img.xkw.com/dksih/QBM/2021/10/10/2826239056224256/2827747879772160/STEM/9ee36b7fe343451188bc8c1e05b6df2b.png?resizew=259)
您最近一年使用:0次
名校
解题方法
2 . 在正方体
中,点
是棱
的中点,点
是线段
上的一个动点.有以下三个命题:
①异面直线
与
所成的角是定值;
②三棱锥
的体积是定值;
③直线
与平面
所成的角是定值.
其中真命题的是___________ .
![](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/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e539f26ed5e0b20ff7220559324869a4.png)
①异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fc725182c2fd1413319fea35b95c7dc.png)
②三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5210296963a878798a2d324e981457d7.png)
③直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f348ed8a1690d3ed02aa64459ca50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b0a582c36d62d83c16425b2f54b4354.png)
其中真命题的是
![](https://img.xkw.com/dksih/QBM/2021/10/7/2823997406011392/2825526451765248/STEM/04e38db72fdd47dba4c86b93c2ab4a0f.png?resizew=201)
您最近一年使用:0次
名校
3 . 已知三棱锥
中,
,
,
,
是等边三角形,则三棱锥
的外接球的表面积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ad8d16722f5b9e7fd2602f14d5ffbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e46571701ccaa18d3c844ab99ee6c30e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c14a66ed4bd66df65bc42c4ac1ed15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
您最近一年使用:0次
2021-09-29更新
|
831次组卷
|
3卷引用:山西省长治市2022届高三上学期9月质量监测数学(理)试题
4 . 如图,在四棱柱
中,底面ABCD和侧面
都是矩形,E是CD的中点,
,
若平面
与平面
所成的锐二面角的大小为
,则线段
的长度为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ed529e6f422105d67412c72a72586a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74e2be6d47d303d719380d43cbfa547d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a83c0b8db2205a6815811aa4ff5390f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15dc61d5de97b5a40be925b278ae494c.png)
![](https://img.xkw.com/dksih/QBM/2021/9/26/2816344780161024/2817300589518848/STEM/510328226db9415689ce4d3b733b6159.png?resizew=256)
您最近一年使用:0次
解题方法
5 . 如图所示,将平面四边形
沿对角线
折成空间四边形,当平面四边形
满足________ 时,空间四边形中的两条对角线互相垂直(填上你认为正确的一种条件即可,不必考虑所有可能情况)
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/393b5172-c7a0-4111-9785-91ff020eb147.png?resizew=275)
您最近一年使用:0次
6 . 如图,正三棱柱
的棱长均为2,点M是侧棱
的中点,过
与平面
垂直的平面与侧面
的交线为l,则直线l与直线
所成角的余弦值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b20bec6da0e92b220021ab497e1ccc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29f491a794b9ac1a85a18c87ecee616c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/eefd829d-7832-4428-a5bd-ed6a2f87c17f.png?resizew=141)
您最近一年使用:0次
2021-09-17更新
|
636次组卷
|
4卷引用:黑龙江省大庆市肇州县二校2020-2021学年高二下学期期末联考数学试题
黑龙江省大庆市肇州县二校2020-2021学年高二下学期期末联考数学试题广东省茂名市高州市2020-2021学年高一下学期期末数学试题广东省汕头市2023届高三上学期期中数学试题(已下线)安徽省(九师联盟)2023届二模数学试题变式题11-16
名校
7 . 如图,在三棱锥
中,
,
都是正三角形,
,
,
分别为棱
,
,
的中点,设直线
与平面
所成角为
,则
的取值范围为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/564743a1fe463a981f06914e3cb5e03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefd06c239145a2b6ae87a955aa51414.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/bf4b2f5a-430c-43db-9924-14251d11883e.png?resizew=153)
您最近一年使用:0次
名校
解题方法
8 . 如图,直四棱柱
的底面是菱形,
,
,
,E是BC的中点.则点C到平面
的距离为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb5a463a03c549b0dba6d90e7f16a2af.png)
![](https://img.xkw.com/dksih/QBM/2021/9/11/2805594877394944/2809189259157504/STEM/752ae805-8cad-4ae2-9b46-f868966d5c36.png?resizew=237)
您最近一年使用:0次
2021-09-16更新
|
524次组卷
|
5卷引用:重庆市西南大学附属中学2021-2022学年高二上学期期中数学试题
重庆市西南大学附属中学2021-2022学年高二上学期期中数学试题(已下线)专题07立体几何线面位置关系(测)(理科)第一篇 热点、难点突破篇-《2022年高考理科数学二轮复习讲练测》(全国课标版)河北省张家口市第一中学(普通实验班)2020-2021学年高二上学期12月月考数学试题(已下线)专题07立体几何线面位置关系(测)(文科)第一篇 热点、难点突破篇-《2022年高考文科数学二轮复习讲练测》(全国课标版)(已下线)专题08向量方法解决角和距离(测)(理科)第一篇 热点、难点突破篇-《2022年高考理科数学二轮复习讲练测》(全国课标版)
解题方法
9 . 设
、
为直线,
为平面,且
,给出下列命题
①若
,则
;②若
,则
;
③若
,则
;④若
,则
,
其中真命题的序号是________________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e18230aaf4caadca8bb93f62eed4101.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe920cd78db25f5b4df37d066e57800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/354bb54738c66f16e4df22a531556feb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb26a220ed44c446105df7caa0f1063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6a4c549e7ea8776ec821c467bc1a913.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6a4c549e7ea8776ec821c467bc1a913.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb26a220ed44c446105df7caa0f1063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/354bb54738c66f16e4df22a531556feb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe920cd78db25f5b4df37d066e57800.png)
其中真命题的序号是
您最近一年使用:0次
10 . 在正三棱柱
中,D为棱AC的中点,
,则直线
和BD所成的角的余弦值为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f2185273bf04c11118c7954f7ec822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baf77bfaf8ada5705c3b9a9714678ebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/020ebe1219437129358b986eb9e70bbf.png)
您最近一年使用:0次