名校
1 . 如图,已知正方体
的棱长为2.
,
分别为
与
上的点,且
,
.
(1)求证:
;
(2)求平面
与平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93ecad355286188fd317939fa50f9555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f308dbf591d107899c6b6a294037088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbea35579e39f3430d7a0ab3b2a984af.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/10/f4217908-8f82-4c26-b9ec-3f3a08c742a4.png?resizew=164)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7949f3086ace91c6c3fa6a91979c93d.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbee3d2962bee74bf65ad4e71bca155.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/193b5b41994c2a4dfa5bb0bc984061cc.png)
您最近一年使用:0次
名校
2 . 如图,四棱锥
中,底面ABCD为等腰梯形,
,
,且平面
平面ABCD,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/31/40128787-8a74-438b-9915-ad4d72ca8e5a.png?resizew=169)
(1)求证:
;
(2)
与平面
所成的角为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a4426db778693c875e2dca9220875d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/555e29e445c95ddb514840f63fbb1d12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15eae3c2cb4274a947f6a011960934d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/31/40128787-8a74-438b-9915-ad4d72ca8e5a.png?resizew=169)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/712f7375b4ede5f75c0d81870c0f86af.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e831e5c6bd9bced710de6c6965ae800.png)
您最近一年使用:0次
2023-05-28更新
|
649次组卷
|
3卷引用:湖南省岳阳市岳阳县第一中学2022-2023学年高三下学期入学考试数学试题
21-22高一·湖南·课后作业
解题方法
3 . 如图,
平面ABCD,
平面ABCD,且
,
,求EF的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a22d6b860f06fe23618b0d3de6768fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0a3600b1760a63a10c9a0429b439dc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/26/63171ebb-63b1-4325-b086-124ea7a09729.png?resizew=161)
您最近一年使用:0次
名校
4 . 如图,在底面是菱形的四棱锥
中,
为
中点,
,
,已知
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/0706b447-169a-40d5-8b24-9144bf907cbd.png?resizew=160)
(1)若
,证明:
;
(2)若
,求二面角
的平面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f67538eedbdf54a1bcaff4394230e81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c161375e4e6f61f1cbef8083c02e975.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52d7a1ed84f2d0fe573b707212d14723.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/0706b447-169a-40d5-8b24-9144bf907cbd.png?resizew=160)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08aa6fd52f3933cbded9ce8c880b4a10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f45265eaed2ba5fc08f6a112a02cd2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/277092a9f86d04837d019a6784511798.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1636b4530c0b42d0e0b649e90e3b9e85.png)
您最近一年使用:0次
2022-01-13更新
|
264次组卷
|
2卷引用:湖南省长沙市第一中学2020-2021学年高二上学期期末数学试题
名校
5 . 如图,在平面四边形
中,
,
,
,以
为轴把
折起,使点
到达点
的位置,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/f411297d-d7f8-4de0-b10f-7bf2b00d0a3a.png?resizew=191)
(1)证明:
;
(2)若
为
的中点,二面角
的大小为60°,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16dc02090b6e9263555061f14fbc8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd6a2b112facda441f4e34bf5c145fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650c6c818df102a83ce5159e3208d01a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307d38cc7012c328f1f22aa793fe76d7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/f411297d-d7f8-4de0-b10f-7bf2b00d0a3a.png?resizew=191)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37002ada5d194d4d062fa3285d7d9824.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715cc9ea5e7d80930284ffb117142770.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f35614aff055b98b76ca262f64e629d.png)
您最近一年使用:0次
6 . 如图,已知
,
平面
,
平面
,过点
且垂直于
的平面
与平面
的交线为
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/03550c3c-6853-49e4-a2b0-a5d97a5ee809.png?resizew=156)
(1)证明:
平面
;
(2)设点
是
上任意一点,求平面
与平面
所成锐二面角的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c5ae16a7145a28a91d45ef950a07c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed04b01505bbd8a4ac0bc12e46f23bf6.png)
![](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/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c770a1e784ddbc07588e2bcd80e151ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f656e1d1f68954e5f06de8958f6a9310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b0393ce62b24aa5f9b740d4cc6743b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/03550c3c-6853-49e4-a2b0-a5d97a5ee809.png?resizew=156)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9df740160690029ac1e730c85f20347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e2da608b66c9aee03e2503388ba4fd.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6c2dad46a9052a4185a4f7b4ae8a2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
您最近一年使用:0次
2020-09-14更新
|
750次组卷
|
6卷引用:湖南省百校联考2020-2021学年高三上学期9月月考数学试题
湖南省百校联考2020-2021学年高三上学期9月月考数学试题江苏省百校联考2020-2021学年高三上学期第一次考试数学试题金太阳联考2020-2021学年新高考(广东卷)数学试题(已下线)专题8.9 《空间向量与立体几何》单元测试卷(测)-2021年新高考数学一轮复习讲练测辽宁省沈阳市大东区2020-2021学年高三(上)第一次月考数学试题山西省晋城市2020-2021学年高二上学期期中数学(理)试题
名校
7 . 已知三棱柱
中,
,
是
的中点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/dff8f8c3-b2fb-4ef3-b490-c205bb1e2700.jpg?resizew=224)
(1)求证:
;
(2)若侧面
为正方形,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4639a9dc0bc99101cbde59fef04b4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f00f9d78c6df49f58a527aac02be39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0acdac99ea95c00e80fbf49941ba2803.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/dff8f8c3-b2fb-4ef3-b490-c205bb1e2700.jpg?resizew=224)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
(2)若侧面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ce0eeb7a6d6c7806cf2352b9fe15c2.png)
您最近一年使用:0次
10-11高二下·广西桂林·阶段练习
解题方法
8 . 如图,已知
,
于点A,
于点B,
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40b707f5ee4fbb2e637c65fbc6d8ed03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/136a4f5f056a5e1337ce0813eac94585.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93c8aeb26a93a074d6e95bc8de66b001.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72d2a947e3fdc214d40a7d3f54679a73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b40cd0b4df57efc852aed0d6100642d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6e577952a0c048d465822b60f264183.png)
您最近一年使用:0次
9 . 如图,在四棱锥
中,平面PAD垂直平面ABCD,底面
为平行四边形,已知
,
,
于
.
![](https://img.xkw.com/dksih/QBM/2018/4/9/1920593447059456/1920893169713152/STEM/f8f142d2576848918b371d476d46eb34.png?resizew=175)
(1)求证:
;
(2)若平面
平面
,且
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02bd5cfe804460846423e77f72db10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/644ec7c3e0d9472da97a78fe7b004a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bba1c6851a385f34214677113d04ffa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9df6a61c453b50f0fea4f4f640df45c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2018/4/9/1920593447059456/1920893169713152/STEM/f8f142d2576848918b371d476d46eb34.png?resizew=175)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1030483a875845da3d8bdeead1c41ecd.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebbb79892c8cb8871a08437acc09bc80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/337421403f59eb20bdc8b446691f8a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89dead99c372e7947e7337dfc4d2a7e1.png)
您最近一年使用:0次