如图所示,四棱锥
中,底面
是平行四边形,
平面
,
,
,
是
中点,点
在棱
上移动.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/c919aec0-c857-4408-a3d0-3d9a7778c68b.png?resizew=173)
(1)若
,求证:
;
(2)若
,当点
为
中点时,求
与平面
所成角的大小.
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e7b6d04f024ca05cdfacc8ce9137c15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/c919aec0-c857-4408-a3d0-3d9a7778c68b.png?resizew=173)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a395778dcf588264f40e1cd8c96206d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71e90f9f4e44173888a54c624852064a.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/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37793a3a810e823e10c340986f55ddd.png)
2020高三·浙江·专题练习 查看更多[4]
(已下线)【新东方】杭州高三数学试卷262浙江省“9+1”高中联盟2019-2020学年高三上学期期中数学试题(已下线)第8章 立体几何初步 章末综合检测 -2021-2022学年高一数学同步备课 (人教A版2019 必修第二册)广东省梅州市大埔县虎山中学2021-2022学年高一下学期5月第二次段考数学试题
更新时间:2020-01-04 22:01:54
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图所示,在四棱锥
中,
底面
,且四边形
是等腰梯形,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b05db872c7a37e0d06ca9f0278f9562.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86f0379c19b6ca46265b3e3ae209f41b.png)
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/d8c3eeb1-a608-4b95-b826-81420f27f4f4.png?resizew=159)
(1)求证:
;
(2)若
是
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/5a1b49f64e0065edad868b25e9fcada3.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/6b05db872c7a37e0d06ca9f0278f9562.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86f0379c19b6ca46265b3e3ae209f41b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb2cd89c860a916732a865840a27ff28.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/d8c3eeb1-a608-4b95-b826-81420f27f4f4.png?resizew=159)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdfa54114f04a75b8c96165b3718ed7f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c650d59680db13009509578129f17f4.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.64)
【推荐2】如图,在底面是菱形的四棱锥P-ABCD中,∠ABC=60o,PA=AB,
.
![](https://img.xkw.com/dksih/QBM/2016/1/8/1572425680715776/1572425686802432/STEM/8635a6563a16430bbb2350d30cb72925.png)
(1)求证:证明:BD⊥平面PAC;
(2)求PC与平面PAB所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69f448b5ea52ae7d0ee6c2c028b8993d.png)
![](https://img.xkw.com/dksih/QBM/2016/1/8/1572425680715776/1572425686802432/STEM/8635a6563a16430bbb2350d30cb72925.png)
(1)求证:证明:BD⊥平面PAC;
(2)求PC与平面PAB所成角的正切值.
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解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,四棱锥P﹣ABCD中,
PAB是等边三角形,底面ABCD是直角梯形,AB
CD,AB⊥AD,AB=BC=2,
,F,G分别是PC,AD的中点.
![](https://img.xkw.com/dksih/QBM/2021/4/13/2699147461820416/2701017308004352/STEM/345fa701-dba7-4c35-8a2d-cc034c936932.png?resizew=250)
(1)求证:FG
平面PAB;
(2)若PC=3,求直线PC与平面ABCD所成角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b96fac11d72f72c805dbddb8da72d68.png)
![](https://img.xkw.com/dksih/QBM/2021/4/13/2699147461820416/2701017308004352/STEM/345fa701-dba7-4c35-8a2d-cc034c936932.png?resizew=250)
(1)求证:FG
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
(2)若PC=3,求直线PC与平面ABCD所成角.
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解答题-问答题
|
适中
(0.65)
【推荐2】如下图,三棱柱
的各棱长都是2,
,
,
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/df86001c-264e-44e0-9516-f996c1f52608.png?resizew=203)
(1)证明:
平面
;
(2)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/ef4bc3e0ac2677701750f289f6db2a7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/872d521f5464873b63ae8919ee1213f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/df86001c-264e-44e0-9516-f996c1f52608.png?resizew=203)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2164a9dd77a54b1999a0f5ab0ecf09df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐3】如图,在多面体
中,
平面
,
,且
为等边三角形,
,
与平面
所成角的正弦值为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/7/2437134e-1d14-40e0-a2dd-a774fa303569.png?resizew=179)
(1)若
是线段
的中点,证明:
平面
;
(2)求二面角
的平面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c5ae16a7145a28a91d45ef950a07c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51af40dd53159814a041f9db4c370565.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/093d4a4bba19f681dc21930fdf341f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3a079cfdcca9acdacecbf08f9f78cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa42621cd6793e7f3673fdb49bc3123.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/7/2437134e-1d14-40e0-a2dd-a774fa303569.png?resizew=179)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d3f5f4c4419913c1232b7aae03ade.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3db1d8f228c87b65a3609f825fc441d5.png)
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