如图,在长方体
中,
,点
为
的中点.
与平面
所成的角;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0fc166a6287ed378b99177440e21424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbc7e774e4ae40c23bf4ceed179230ca.png)
22-23高一·全国·课后作业 查看更多[2]
更新时间:2023-02-06 08:56:43
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】.如图,在四棱锥
中,底面
是正方形,侧棱
,
,
是
的中点,
交
于点
.
![](https://img.xkw.com/dksih/QBM/2015/2/4/1571975634386944/1571975640375296/STEM/4b5d80779f54475dbd7e9c5706a7ca58.png)
(1)证明
//平面
;
(2)证明
⊥平面
;
(3)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6153163fecdf3f410411048428ccaef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377890137b32fe2ddba89a294ecefad2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40d4d36ae30487030b827ce9413b9f13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78938662dc545ac76b24d613f95416e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2015/2/4/1571975634386944/1571975640375296/STEM/4b5d80779f54475dbd7e9c5706a7ca58.png)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65277734669566578cbb7d690bb200fb.png)
(2)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebce46aeb97373353179e5669365fa4a.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f37cc328fb3d49c29002060ffeb4a623.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐2】如图,直三棱柱
中,
是侧棱
的中点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/24/e344b354-a140-4f3c-a73a-6231d2347825.png?resizew=137)
(1)求证:平面
平面
;
(2)若
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52eee03a2d9838fc79efc2946dd21087.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/24/e344b354-a140-4f3c-a73a-6231d2347825.png?resizew=137)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6141af2b20b72d98c97c177b2083d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f96c673a2381f118ea2d3efc0bca1f3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05740f0c6071846227dc0ec177ad15e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78f4dad88918b02ae715b542e29605c6.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,组合体由棱长为2的正方体
和四棱锥
组成,
平面
,
,
是
中点,
是
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/43990735-89b3-4648-baaa-306ab2492fc7.png?resizew=172)
(1)求证:
平面
;
(2)求证:
;
(3)求
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fb2e071d4e01107dcf7d95cbb86b415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c76d296e1cf0e421b3969c70064f6fcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/43990735-89b3-4648-baaa-306ab2492fc7.png?resizew=172)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2445410cbe966ccea7e995b1b1f6f462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81bf7a859123936a07193592e089340a.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49dde1a85749071c10183fe8ecf56ca.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81bf7a859123936a07193592e089340a.png)
您最近一年使用:0次
【推荐2】如图,四面体ABCD中,△ABC是正三角形,△ACD是直角三角形,∠ABD=∠CBD,AB=BD.
(1)证明:平面ACD⊥平面ABC;
(2)设AB长为1,点E为BD的中点,求点D到平面ACE的距离.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/31/c763ab53-0efc-4f7d-bcc4-cdac3423cde1.png?resizew=184)
(1)证明:平面ACD⊥平面ABC;
(2)设AB长为1,点E为BD的中点,求点D到平面ACE的距离.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如下图,在三棱柱
中,底面
是边长为2的等边三角形,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/16/8d67e2c2-2d4b-412b-9227-ad0ab6aa7311.png?resizew=191)
(Ⅰ)求证:
;
(Ⅱ)若四边形
是正方形,且
,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/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/16/8d67e2c2-2d4b-412b-9227-ad0ab6aa7311.png?resizew=191)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b02ad9a7009075820aaf9eee43fab3.png)
(Ⅱ)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c5aa738865bade7eb71bed5b7e4cd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8b5a6dbcf05f572f83f51abf7d668c.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】如图,正方体
边长为
,
是
上的一个动点.求:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/e4d9666a-a845-497a-a888-67bdd3f7bb9b.png?resizew=162)
(1)直线
与平面
所成角的余弦值;
(2)
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/e4d9666a-a845-497a-a888-67bdd3f7bb9b.png?resizew=162)
(1)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b6045e63d546611337952d20f6d9876.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51a8d10345f567e0f2daf18529d42f0.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐3】如图,
是矩形
所在平面外一点,且
平面
.已知
.
的大小;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58a9658abe4bff2f1326c5aadb1fa428.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715cc9ea5e7d80930284ffb117142770.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,斜三棱柱
中,侧面
为菱形,底面
是等腰直角三角形,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/13/0d5e4432-0716-44f7-9e1c-9efbbe16ab4e.png?resizew=232)
(1)求证:直线
直线
;
(2)若直线
与底面
成的角为60°,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22a88ebea3a5f318dd06cb7fffea9d77.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/13/0d5e4432-0716-44f7-9e1c-9efbbe16ab4e.png?resizew=232)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45cbb74984939d59964559c3560ef7ba.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】如图,在四棱锥P-ABCD中,AD⊥平面ABP,BC//AD,∠PAB=90°,PA= AB =2,AD=3,BC =1,E是PB的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/19/d6cfe16b-2317-4f68-a9ce-42e0366bf59a.png?resizew=216)
(1)证明:PB⊥平面ADE;
(2)求直线AP与平面AEC所成角的正弦值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/19/d6cfe16b-2317-4f68-a9ce-42e0366bf59a.png?resizew=216)
(1)证明:PB⊥平面ADE;
(2)求直线AP与平面AEC所成角的正弦值.
您最近一年使用:0次