如图,在五面体
中,四边形
是边长为
的正方形,
平面
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2014/4/28/1571679744958464/1571679750889472/STEM/2aefb6579d1e4894823827e914002c6f.png)
(1)求证:
平面
;
(2)求直线
与平面
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4901a7eda97d6a307db76c4fb196ba3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c07b92b8282c7fd1158b3b5098e38c39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d1b2f8e921264ebe993d8e36587e9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6166b9a5437671bcba31e17c375eb39.png)
![](https://img.xkw.com/dksih/QBM/2014/4/28/1571679744958464/1571679750889472/STEM/2aefb6579d1e4894823827e914002c6f.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbe3ec31a79a171dcf274ff99e50762.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
2014·广东广州·一模 查看更多[3]
更新时间:2016-12-02 22:53:32
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相似题推荐
解答题-证明题
|
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(0.85)
名校
【推荐1】在四棱锥
中,底面
为梯形,
.设
的中点分别为
.
![](https://img.xkw.com/dksih/QBM/2020/2/11/2396876325773312/2397344268165120/STEM/084fc1bf97ea40eeaedc1245648c0df2.png?resizew=230)
(1)求证:
四点共面;
(2)若
,且
,求异面直线
与
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/9f90126f831d6600522ecaa66c2a8b9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ef7acdd4513f04e48b2353592cdfd92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48593b2bdb51550ec0a2b9d5893d36fe.png)
![](https://img.xkw.com/dksih/QBM/2020/2/11/2396876325773312/2397344268165120/STEM/084fc1bf97ea40eeaedc1245648c0df2.png?resizew=230)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48593b2bdb51550ec0a2b9d5893d36fe.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b757706eee506a078fc25e3f33a70cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8726e6a11ad400cfd860b09debe475be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
您最近一年使用:0次
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【推荐2】如图,在棱长为
的正方体
中,
是棱
的中点.
(1)求三棱锥
的体积;
(2)求异面直线
与
所成角大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.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/22adbc0da438220f9cace11b629d799b.png)
(1)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11e814415f4794ad7986a55a2ea2d5f5.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/4b66c838-a133-4138-af4c-d93a63a5e17f.png?resizew=126)
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【推荐3】如图,在四棱锥
中,底面
是矩形,
平面
,
,M是
的中点,点Q在
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/0146799c-1418-4353-999c-893ceae60e94.png?resizew=134)
(1)证明:
平面
;
(2)求直线
与
的夹角.
![](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/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78346d9e5dceebcba8979784ee1720fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/875cd2860fb57cedf932aa0535d2e1da.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/0146799c-1418-4353-999c-893ceae60e94.png?resizew=134)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c982eb645d77aa24c642fca6d72e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c745df4f226027778d5fe45b6501b822.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
您最近一年使用:0次
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【推荐1】如图,在四棱锥
中,底面
为直角梯形,
,
底面
,
,
,
为
的中点,
为棱
的中点.
![](https://img.xkw.com/dksih/QBM/2017/2/10/1625065709297664/1625065709854720/STEM/a0cd6ad005d24527bedf8d1256842be7.png)
(I)证明:
平面
;
(II)已知
,求
点到平面
的距离.
![](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/0facf189b2a3153beb7b9e077d3b1146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ff6d7dd48b57f03d82d2c522ee9b94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e839ac941e8bf536ff35a12e56c7a400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/2017/2/10/1625065709297664/1625065709854720/STEM/a0cd6ad005d24527bedf8d1256842be7.png)
(I)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/083b08552886374380117e5146525855.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c233190f9339e777fe26c7b690541baf.png)
(II)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e159921cdcf0e3bb64ddc32015e1a361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c233190f9339e777fe26c7b690541baf.png)
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【推荐2】如图,在三棱锥
中,
.
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573004456312832/1573004461760512/STEM/2b0b0bdc062d446bad6333c2c85303ab.png)
(Ⅰ)求证:
;
(Ⅱ)求三棱锥
的体积.
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573004456312832/1573004461760512/STEM/404dc33059ad4b789729530b4c8ffb17.png)
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573004456312832/1573004461760512/STEM/fe7ce458ad1c406bb9d472ebc18b6f58.png)
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573004456312832/1573004461760512/STEM/2b0b0bdc062d446bad6333c2c85303ab.png)
(Ⅰ)求证:
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573004456312832/1573004461760512/STEM/a01308ab32774397937e2ea60445d476.png)
(Ⅱ)求三棱锥
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573004456312832/1573004461760512/STEM/404dc33059ad4b789729530b4c8ffb17.png)
您最近一年使用:0次