如图,在五面体
中,四边形
为正方形,平面
平面
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/2/25/2665512682430464/2668346601807872/STEM/0c4dd9d678b84050a904ec8525477ff9.png?resizew=189)
(1)若
,求二面角
的正弦值;
(2)若平面
平面
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c674dc5024374f53920947c4cf4baf11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2f3df5713a423887c16e6355236372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c11e72609ba0fbefe03c9f24165cbf11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74e0212491e4b2d7525de9a87fab3a6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fda0065dba34b90de18ad2d9009aefe3.png)
![](https://img.xkw.com/dksih/QBM/2021/2/25/2665512682430464/2668346601807872/STEM/0c4dd9d678b84050a904ec8525477ff9.png?resizew=189)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ade06068471a9d76e32b417bef7551.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3832d29aa3ea504aa3bef7c87d62884.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42ce82a4c37365f2d4dea2c4ad2e3288.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
2021·江苏·一模 查看更多[5]
江苏省盐城市、南京市2021届高三下学期第一次模拟考试数学试题(已下线)精做04 立体几何-备战2021年高考数学大题精做(新高考专用)湖北省新高考联考协作体2020-2021学年高二下学期期末数学试题江苏省无锡市江阴市第一中学2020-2021学年高一下学期5月月考数学试题(已下线)第1章 空间向量与立体几何-2021-2022学年高二数学课后培优练(人教A版2019选择性必修第一册)
更新时间:2021-03-01 09:07:58
|
相似题推荐
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图在平行六面体
中,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/b53e3526-5bbb-4761-a7d5-8e0c98a48c6f.png?resizew=194)
(1)求证:直线
平面
;
(2)求直线
和
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cead0e8eadfdcefa334953e88864f424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/792f618eca1484e7f056025984ce4a70.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/b53e3526-5bbb-4761-a7d5-8e0c98a48c6f.png?resizew=194)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26d8a9d64ad3c8cba28840b41ed7837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bf9ef324f1289e205e29fed105c38e.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
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解题方法
【推荐2】如图,三棱柱
的所有棱长都是
,
平面
,
分别为
的中点,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/79f72f98-3142-4f8d-aae0-a8803fc6c167.png?resizew=189)
(1)求证:
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a773f779cd892616a4ff68d3715f173.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/79f72f98-3142-4f8d-aae0-a8803fc6c167.png?resizew=189)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a148a5584e41408fc74f8bd386b5b8.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a148a5584e41408fc74f8bd386b5b8.png)
您最近一年使用:0次
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【推荐3】如图,已知四棱锥
的底面为矩形,
且
平面
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/2011/5/12/1570194802278400/1570194807717888/STEM/e85d106d-77ea-4771-bba7-9c11f00aa72c.png?resizew=180)
(1)求证:
;
(2)求二面角
的大小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a696665d7435296821bf075e4e4dab11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58bf40f6235d0231481c2598e2ba977b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbb19cb4eb2d7f3207559eb07355ba2.png)
![](https://img.xkw.com/dksih/QBM/2011/5/12/1570194802278400/1570194807717888/STEM/e85d106d-77ea-4771-bba7-9c11f00aa72c.png?resizew=180)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7459863f058993e17b7dcf902053eccd.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11f8759991daa986ef2e729fb6170ccf.png)
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【推荐1】如图,在四棱锥
中,底面
为菱形,
平面
与
相交于点
,点
在
上,
.
平面
;
(2)若
与平面
所成的角为
,平面
与平面
的夹角为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/7af202d1a5fa269d35a59501b3ad875e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.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/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94da624bd08a236218b500091d4aec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1e0bd4b30dc777ac9da80f6baa3eb31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc4c63a548b91061528aa11058de75.png)
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解题方法
【推荐2】如图,圆柱
的轴截面
是一个边长为2的正方形,点D为棱
的中点,
为弧
上一点,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a5ea869898cc240dc9e8e625d1aec8.png)
![](https://img.xkw.com/dksih/QBM/2022/3/7/2931198959747072/2933490148483072/STEM/22c6c82fe7df45798d6a36f61161d0d5.png?resizew=163)
(1)求三棱锥
的体积;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192f4f9446c954a291f779d963f90257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a5ea869898cc240dc9e8e625d1aec8.png)
![](https://img.xkw.com/dksih/QBM/2022/3/7/2931198959747072/2933490148483072/STEM/22c6c82fe7df45798d6a36f61161d0d5.png?resizew=163)
(1)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ff1162331c2b289e40dc5da3657ae7.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/879eae4064032def19624960cb56309b.png)
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【推荐3】如图,在四棱锥
中,底面
是边长为
的菱形,
是等边三角形,
,平面
平面
,点
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/c92d4c3f-be58-4d68-80d5-05203085dcc4.png?resizew=203)
(1)证明:
平面
;
(2)求平面
与平面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70283d9149df6362e5274aedcb8f0235.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/c92d4c3f-be58-4d68-80d5-05203085dcc4.png?resizew=203)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8197bf06d017950c85c3ba6a291c095e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
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适中
(0.65)
名校
【推荐1】如图,在四棱锥
中,
为平行四边形,
,
平面
,且
,点
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/97c57169-77b2-45fc-93b1-d98687a06cec.png?resizew=236)
(1)求证:
平面
;
(2)在线段
上(不含端点)是否存在一点
,使得二面角
的余弦值为
?若存在,确定
的位置;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bf01adbdbab49dc9915b957ddf85351.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.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/1bb7b50091ad217f18db44fe0fc1550a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/97c57169-77b2-45fc-93b1-d98687a06cec.png?resizew=236)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa69a2247ad4d5231aa361349b12f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e2da608b66c9aee03e2503388ba4fd.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e4cb797a03b0d96fa146543101f993c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d83fb9ac8a18e78a4c56da79514b5ccb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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,已知四棱锥
的底面为边长为
的菱形,
为
中点,连接
.
![](https://img.xkw.com/dksih/QBM/2019/4/28/2192350506106880/2193075904602112/STEM/4f083674-f482-4613-9d13-e679bda6b531.png?resizew=446)
(Ⅰ)求证:平面
平面
;
(Ⅱ)若平面
平面
,且二面角
的余弦值为
,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f33276416f019d734183eab2d0121ed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://img.xkw.com/dksih/QBM/2019/4/28/2192350506106880/2193075904602112/STEM/4f083674-f482-4613-9d13-e679bda6b531.png?resizew=446)
(Ⅰ)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2a355389fc797dbe23960c55c18df83.png)
(Ⅱ)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e657a4a33ed01c3a2807218100efbef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
名校
【推荐3】如图,在三棱台
中,若
平面
,
为
中点,
为棱
上一动点(不包含端点).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/ddd6f749-2233-40cc-83be-c23af6b57f86.png?resizew=167)
(1)若
为
的中点,求证:
平面
.
(2)是否存在点
,使得平面
与平面
所成角的余弦值为
?若存在,求出
长度;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ecf072589c0f901d92f6bda111d841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1a65945b5b78ef143ab5d004bbb0625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9652a25569e1dc999a562df292d3770.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/ddd6f749-2233-40cc-83be-c23af6b57f86.png?resizew=167)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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