如图的多面体是由一个直四棱柱被平面
所截后得到的,其中
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/e493f410-b042-4fbc-9f2f-895e96e88793.png?resizew=191)
(1)求证:平面
平面
;
(2)求直线
与平面
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80f51c31583fea58fde645474d60b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e08a6cc0572f4eee8231684be027d6c9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/e493f410-b042-4fbc-9f2f-895e96e88793.png?resizew=191)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6d0567ee284567a5d42b3c0b95083ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb58ca76c1fb28b4cb408bb9897b70a1.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4083c581c6027c4b2ae7e3b3749f485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
2022·云南保山·模拟预测 查看更多[3]
云南省保山市2022届高三第一次教学质量监测数学(理)试题(已下线)重难点03 立体几何与空间向量-2022年高考数学【热点·重点·难点】专练(全国通用)宁夏石嘴山市第三中学2023届高三上学期期末考试数学(理)试题
更新时间:2022-02-21 21:19:11
|
相似题推荐
解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】正三棱柱
底边长为2,E,F分别为
,AB的中点.
![](https://img.xkw.com/dksih/QBM/2022/1/31/2906233640329216/2909395287867392/STEM/557c5364-1318-402a-a3a2-991628f806ea.png?resizew=184)
(1)求证:平面
平面
;
(2)若
与平面
所成的角的正弦值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/2022/1/31/2906233640329216/2909395287867392/STEM/557c5364-1318-402a-a3a2-991628f806ea.png?resizew=184)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de45d2433de1eedd376a3c10816e0d0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8035fc825a001d7d9a3dacd8271662.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce1b066f8869d0ff4513f7a99745125.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8b959c2e73565b18f96256c3161e19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
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解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐2】已知在四面体
中,
,
,点
,
,
,
分别为棱
,
,
,
上的点,且
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/7/30/2516895004139520/2517198065188864/STEM/ad7ee7ed-7445-491b-a382-77fb25468054.png)
(Ⅰ)当
时,求证:
平面
;
(Ⅱ)当
变化时,求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9953b7b5c647641edbec4c2ab90a65f4.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8361ee004d1e0716806b41a637a09c8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cccb4b70dda48486aa453b3be6da9b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eaba3121781cfb64ca946987ffef383.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35e83b56388e7b274a3fcf74cd74f6ca.png)
![](https://img.xkw.com/dksih/QBM/2020/7/30/2516895004139520/2517198065188864/STEM/ad7ee7ed-7445-491b-a382-77fb25468054.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1c3ea872a20fdc1843cb5ffce8a554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f33fa5152ba27f7b8a28890cefca219.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bb5012f6c70a1e98d682b6d021fadd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】在直三棱柱
中,已知
为
的中点,
.
![](https://img.xkw.com/dksih/QBM/2022/10/9/3084080566632448/3085124542873600/STEM/4ee42f098dcc425191221a6f2d37c8e9.png?resizew=190)
(1)证明:
;
(2)若底面
是等腰直角三角形,
,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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e54038fa9518fc9a3aa2cb97a74196.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f09f412245022cf4e68efef22525f7e.png)
![](https://img.xkw.com/dksih/QBM/2022/10/9/3084080566632448/3085124542873600/STEM/4ee42f098dcc425191221a6f2d37c8e9.png?resizew=190)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bd48fe75d71e5658e92873326e2e3a9.png)
(2)若底面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8e9ec412ea0355e4e5cd06c60e5fee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/488c9cb4d88938d832617f520a3ca951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.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2】在四棱锥
中,
底面
,且
,四边形
是直角梯形,且
,
,
,
,
为
中点,
在线段
上,且
.
平面
;
(2)求直线PB与平面
所成角的正弦值;
(3)求点
到PD的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5acb763021bf166ca719d07223591d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8745717601cd14b46c2298919b41b502.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc90c2d45477e166b02359525f40aa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0457394ce4f2dc8d940c565c94dcf557.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求直线PB与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37793a3a810e823e10c340986f55ddd.png)
(3)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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