如图,四棱锥
中,
平面ABCD,底面ABCD是正方形,
,E为PC上一点,当F为DC的中点时,EF平行于平面PAD.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/f62a42fc-8213-4202-b2e2-53e2ff927791.png?resizew=180)
(Ⅰ)求证:
平面PCB;
(Ⅱ)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99926bf272cd757f0985c69b390ebcce.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/f62a42fc-8213-4202-b2e2-53e2ff927791.png?resizew=180)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
(Ⅱ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eaa13915786802de6a540d56dec821b.png)
19-20高三·湖北武汉·阶段练习 查看更多[4]
2020届湖北省部分重点中学高三第二次联考数学试卷理科试题重庆市第一中学2019-2020学年高二下学期期中数学试题(已下线)数学-6月大数据精选模拟卷02(山东卷)(满分冲刺篇)重庆市凤鸣山中学2020-2021学年高二下学期期中数学试题
更新时间:2020-02-10 20:47:24
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解答题-问答题
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解题方法
【推荐1】如图,在四棱台
中,底面为矩形,平面
平面
,且
.
![](https://img.xkw.com/dksih/QBM/2021/10/11/2827064973729792/2828465122910208/STEM/bb941d17-fa98-4736-b546-63192229e1f1.png?resizew=247)
(1)证明:
平面
;
(2)若
与平面
所成角为
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a45953045e613b97eeee15ac188ae2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c52091eb745de866044477641a7c55f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e6b6b19c079b935283768502ff7eb13.png)
![](https://img.xkw.com/dksih/QBM/2021/10/11/2827064973729792/2828465122910208/STEM/bb941d17-fa98-4736-b546-63192229e1f1.png?resizew=247)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c52091eb745de866044477641a7c55f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c52091eb745de866044477641a7c55f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9a248d1d22e1c29cfbce96b32e2206.png)
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【推荐2】如图,在三棱柱
中,
平面
,
为
的中点,
交
于点
,
,
,侧面
的周长为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/471c2e61-6cc6-44ca-a462-0912e9b2036e.png?resizew=149)
(1)证明:
平面
;
(2)设
是棱
上的点,且
,求四棱锥
的体积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8bfe2553e852df73185d017c0a62fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/471c2e61-6cc6-44ca-a462-0912e9b2036e.png?resizew=149)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/091a29c9d8fd28a50ef949df822595b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1220f20f4a1ae4e6ae49019ebf354d12.png)
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【推荐3】如图在三棱锥P-ABC中,平面PAB⊥平面PBC,PB⊥BC,PD=DB=BC=AB=AD=2.
![](https://img.xkw.com/dksih/QBM/2021/9/3/2800036107902976/2801395416547328/STEM/bc8e1bc7-54a6-4ea9-8ad0-2e47501d2c75.png?resizew=198)
(1)证明:PA⊥平面ABC;
(2)求二面角B-AD-C的余弦值.
![](https://img.xkw.com/dksih/QBM/2021/9/3/2800036107902976/2801395416547328/STEM/bc8e1bc7-54a6-4ea9-8ad0-2e47501d2c75.png?resizew=198)
(1)证明:PA⊥平面ABC;
(2)求二面角B-AD-C的余弦值.
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【推荐1】如图,多面体
中,四边形
为菱形,
平面
,且
.
![](https://img.xkw.com/dksih/QBM/2022/12/18/3133684338925568/3134944067674112/STEM/d35bf076251e4b118b40a22b6a93803d.png?resizew=243)
(1)求证:
;
(2)求二面角
的大小.
![](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/0ceffa9073eaad87857467553f556cee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75b38f3c6f62e4c04db3253525b74240.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d552b00c85d1e11ef3ac6b6e06221fa.png)
![](https://img.xkw.com/dksih/QBM/2022/12/18/3133684338925568/3134944067674112/STEM/d35bf076251e4b118b40a22b6a93803d.png?resizew=243)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db1cb818977a967130ef41cd3f9f4fc6.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adef2eaf43d5af6e27d779533b26f461.png)
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【推荐2】如图,在五面体
中,
平面
,
,
,
.
为线段
的中点,证明
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
(2)若
,
,
,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38b5c1c5518b9332a2fb209c3621c700.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5d379ef9a50ae13b4264559ddd64da4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db807b09cc550f476b3f8fa0c6a14425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b40d0d2f3cdd8981bb792ad87efb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2977ae4bfa32de8c6f0fb136205c4fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
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【推荐3】如图,在三棱锥
中,
,
,
平面
,平面
平面
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/17/82d50d27-4692-4979-83dc-30b553aab968.png?resizew=156)
(1)求证:
;
(2)求平面
与平面
的夹角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd893c4964b7f1ef69f0563d74c76d0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b40d0d2f3cdd8981bb792ad87efb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.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/editorImg/2024/2/17/82d50d27-4692-4979-83dc-30b553aab968.png?resizew=156)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf2f0df53aa68c9c334165034788166.png)
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【推荐1】如图,在四棱锥
中,其中
,
,点
是线段
的中点,
,
为等边三角形.
![](https://img.xkw.com/dksih/QBM/2020/11/23/2599217251106816/2603654220677120/STEM/28f333d0c1cf421d828dbe3473dea879.png?resizew=147)
(1)求证:直线
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b50764300055c2c54ae864da92279a2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bce559fceb4731f8d4323410075a22b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e9a50a11c316b4414f39c5d85e8b572.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c009f663ad2b0c3ba521daf4b86b066f.png)
![](https://img.xkw.com/dksih/QBM/2020/11/23/2599217251106816/2603654220677120/STEM/28f333d0c1cf421d828dbe3473dea879.png?resizew=147)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982d01f052709b72afeaf1015fc7acc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d923a338dd2d2e29336b42574d38448.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bfae15acb0bb08e8d3f28cc204bff37.png)
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【推荐2】如图,在四棱锥
中,
平面
,
,
为等边三角形,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/ca0a51c4-f6e4-4288-9b5d-806a6f5da742.png?resizew=155)
(1)求证:
平面
,且
平面
.
(2)已知
,
,求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c1c122603b60b6f1a1334ddb56c3fb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a682c80413bd845f60f58362a6d766.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/ca0a51c4-f6e4-4288-9b5d-806a6f5da742.png?resizew=155)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7175df06e33cad4e6bbc3f2f6b0a2986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
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【推荐3】如图,已知在四棱锥
中,底面
为等腰梯形,
,
,
,
,点
在底面的投影
恰好为
与
的交点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/9516c6e1-e848-43c9-ab82-4985321daf7e.png?resizew=182)
(1)证明:
;
(2)若
为
的中点,求二面角
的余弦值.
![](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/ae1e04eeb4de72e5750dae77bcb6f88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0214e0eef02eadddf59c12d30bada70b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14e697f29fdbcb8bd70b4294a45d3e3c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/9516c6e1-e848-43c9-ab82-4985321daf7e.png?resizew=182)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbd7c2767c106faf27d6a97ebc8e739.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28f06184f021ac21d72de1c7f55b0778.png)
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