如图,在四棱锥
中,
是等腰直角三角形,
,底面
是直角梯形,其中
,
,
,
,
,
![](https://img.xkw.com/dksih/QBM/2021/6/11/2740933043470336/2740967180500992/STEM/d5b534de-1f0c-434f-84cf-389f8684f21b.png)
(1)证明:
平面
;
(2)求二面角
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6666f5643e0342ccd7b1777743bb4e20.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/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b40d0d2f3cdd8981bb792ad87efb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08aa6fd52f3933cbded9ce8c880b4a10.png)
![](https://img.xkw.com/dksih/QBM/2021/6/11/2740933043470336/2740967180500992/STEM/d5b534de-1f0c-434f-84cf-389f8684f21b.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ac2a2bb310b6d49725ebbe7581c3b6.png)
21-22高二上·浙江·期末 查看更多[3]
(已下线)【新东方】在线数学162高二上(已下线)第25节 直线、平面垂直的判定与性质-备战2023年高考数学一轮复习考点帮(全国通用)山东省莱西市第一中学2021-2022学年高一下学期华商班6月月考数学试题
更新时间:2021-06-11 23:34:54
|
相似题推荐
解答题-证明题
|
适中
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解题方法
【推荐1】四棱锥
中,
平面
,四边形
为平行四边形,
.
![](https://img.xkw.com/dksih/QBM/2022/3/24/2943276202401792/2944007450034176/STEM/d24e1a3be34d4bbea89c75c127e93ff3.png?resizew=183)
(1)若
为
中点,求证
平面
;
(2)若
,求面
与面
的夹角的余弦值.
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b929269c53a44907dba8ee298a0a522.png)
![](https://img.xkw.com/dksih/QBM/2022/3/24/2943276202401792/2944007450034176/STEM/d24e1a3be34d4bbea89c75c127e93ff3.png?resizew=183)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d0492b25f10ae45c39f8e9838519259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c745df4f226027778d5fe45b6501b822.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8babfafd7bf8c6cccef28aaa814932d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b60870baa5e3fbc33a749aa5f0a94be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
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【推荐2】如图,四棱锥中,
,
侧面
为等边三角形,
,
.
![](https://img.xkw.com/dksih/QBM/2017/7/7/1725037204283392/1726254636351488/STEM/8e3a1fb8c36445acba2ab39999617e28.png?resizew=216)
(1)证明:
;
(2)求二面角
的平面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd6a2b112facda441f4e34bf5c145fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd6a2b112facda441f4e34bf5c145fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9c9cfa597b444b5c9dbae7a825a695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/578b8b2e929abc6e2fb4843cfb63e5a8.png)
![](https://img.xkw.com/dksih/QBM/2017/7/7/1725037204283392/1726254636351488/STEM/8e3a1fb8c36445acba2ab39999617e28.png?resizew=216)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc27219e5dd5c2acbf47cc63ae75b018.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0455492c3db408f8d1d19c57d122a9ac.png)
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【推荐1】如图,已知在矩形
中,
,
,点
是边
的中点,
与
相交于点
,现将
沿
折起,点
的位置记为
,此时
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/39a0bfcb-0355-4523-a217-5a44acf0472b.png?resizew=311)
(1)求证:
平面
;
(2)求证:
面
;
(3)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d30374a2dad85e336ceaa462be7e00e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b123ae31090740589ba27a846620b5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/39a0bfcb-0355-4523-a217-5a44acf0472b.png?resizew=311)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982d01f052709b72afeaf1015fc7acc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e536350bcd19804313eb04f43622943c.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b1c91be4cd269b869d0fa2956b3685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e536350bcd19804313eb04f43622943c.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d7f66b146fccec50efa1c316aa1afe0.png)
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【推荐2】在四棱锥
中,
,
,
平面ABCD,E为PD的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/e19e64be-3887-4e6c-b034-c49ddfdb43c2.png?resizew=171)
(1)求四棱锥
的体积V;
(2)若F为PC的中点,求证:平面
平面AEF;
(3)求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37444a4da006d26dd252bee7c6cecf01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6853d227df9b14f4cbd5560f913e54a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f5019d74a9497f861a0f755ea31d010.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/e19e64be-3887-4e6c-b034-c49ddfdb43c2.png?resizew=171)
(1)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
(2)若F为PC的中点,求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f4096ff62b4f29932cd8c6eef661a3.png)
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【推荐3】如图,将一副三角板拼接,使它们有公共边
,且使两个三角形所在的平面互相垂直,若
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/4dd909f6-212e-4d0f-82a9-af5d58490b4b.png?resizew=168)
(1)求证:
平面
;
(2)求二面角
的平面角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cbab4a3f9636fe3eeee75ba79d08a52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20fe532cad7a1f9279d58874aa4def00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/4dd909f6-212e-4d0f-82a9-af5d58490b4b.png?resizew=168)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca6d1c5eace748465b2dad5065f5111c.png)
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