如图,在三棱锥P-ABC中,PA⊥AB,PA⊥AC,AB⊥BC,
,D为线段AC的中点,E为线段PC上一点.
![](https://img.xkw.com/dksih/QBM/2022/2/20/2920728588959744/2935568370122752/STEM/1f9fe9c3-636f-4fc7-8017-97de70d07f4c.png?resizew=168)
(1)求证:平面BDE⊥平面PAC;
(2)求二面角P-BC-A的平面角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81981fd7b343f4fe2db8f36eb66c1ce7.png)
![](https://img.xkw.com/dksih/QBM/2022/2/20/2920728588959744/2935568370122752/STEM/1f9fe9c3-636f-4fc7-8017-97de70d07f4c.png?resizew=168)
(1)求证:平面BDE⊥平面PAC;
(2)求二面角P-BC-A的平面角的大小.
21-22高一上·陕西西安·期末 查看更多[2]
陕西省西安市建筑科技大学附属中学2021-2022学年高一上学期期末数学试题(已下线)高一数学下学期期末精选50题(提升版)-2021-2022学年高一数学考试满分全攻略(人教A版2019必修第二册)
更新时间:2022-03-13 22:12:02
|
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】如图,在多面体
中,四边形
是边长为2的正方形,
且
,
平面
,D为
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/20/b667ed08-0d59-404f-b046-20b869b48467.png?resizew=156)
(1)证明:平面
平面
;
(2)若
,求平面
与平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d05ea065c0a17855a802e939e4e7e132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/776176f2b0651ac876b829eaaaef7e78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d11a28bef17bfd0ca5c413767badecf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0809ca0e5cf0b667f8d1c11f38bdfd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/776176f2b0651ac876b829eaaaef7e78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88b866f54e2c5c1df06364cdc7eb59bc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/20/b667ed08-0d59-404f-b046-20b869b48467.png?resizew=156)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efb919821665be91ef38ab5da61ba5fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c07424112ebebf19d43989cb7686a5bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a211ad5a06b505b8365a62c1946f3cb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b94e97d085cea077cb82a0b7d2f523e.png)
您最近一年使用:0次
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|
适中
(0.65)
【推荐2】如图,在三棱柱
中,
为正三角形,
,
,
,点
为
的中点.
![](https://img.xkw.com/dksih/QBM/2021/7/8/2759647340896256/2759910552076288/STEM/890e917832bd49d69c12a4a5fc8eed45.png?resizew=199)
(1)证明:
平面
;
(2)求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbec5434bcf9173dfeebd92aa0c5070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98474425eb86a28f2b01cec95643ae7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c9d5815dc775d5a5810fff0b016a8d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b3ca4d74a79ffaa761ee91ddd7acd40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/2021/7/8/2759647340896256/2759910552076288/STEM/890e917832bd49d69c12a4a5fc8eed45.png?resizew=199)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8bfe2553e852df73185d017c0a62fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99f488b85184d4e9d5fc9ccd0cfda8c5.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea848cd2aa3a464618020475097949fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99f488b85184d4e9d5fc9ccd0cfda8c5.png)
您最近一年使用:0次
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【推荐3】如图,在三棱柱
中,
为正三角形,
,
,
,点
为
的中点,点
.
![](https://img.xkw.com/dksih/QBM/2020/5/12/2461197630693376/2461409968914432/STEM/8a385be8ee65478fbe9f02e5b82d7d7b.png?resizew=203)
(1)证明:
;
(2)求
和平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98474425eb86a28f2b01cec95643ae7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c9d5815dc775d5a5810fff0b016a8d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00de3b5f3920068743971c8f05638863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf821ca9421940a4ccf8bd03534b4b9.png)
![](https://img.xkw.com/dksih/QBM/2020/5/12/2461197630693376/2461409968914432/STEM/8a385be8ee65478fbe9f02e5b82d7d7b.png?resizew=203)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d1a365832df6937ff1411728420538.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/022129b7ae91e9a6a8badb203d2045a1.png)
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【推荐1】如图,边长为
的正方形
中,点
,
分别是边
,
上的点,且
.现将
,
分别沿
,
折起,使
,
两点重合于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/2a6d161e-4c4c-44e2-b7ea-0348a5f5fd85.png?resizew=336)
(1)求证:平面
平面
;
(2)求
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60dc1d223055a57ef7127d1aef0e6d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f460edcced5597615113c0fdc95b1dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b6fdadad5411ba41fae9277326f49cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/2a6d161e-4c4c-44e2-b7ea-0348a5f5fd85.png?resizew=336)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba869e032fb27e1c8e8066c6b0c5c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d246f9eceab371ebf47a47c2f11a4ad.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fbbe7f48676298f2ee0cb1901992eaf.png)
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适中
(0.65)
解题方法
【推荐2】如图,在三棱锥V-ABC中,
底面ABC,
,D是棱AB的中点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/afe18bab-d9d9-4256-a8ef-0ccbce8118f1.png?resizew=149)
(1)证明:平面
平面VCD;
(2)若
,且棱AB上有一点E,使得线VD与平面VCE所成角的正弦值为
,试确定点E的位置,并求三棱锥C-VDE的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d01592b7e10bf087d1465f9d6899bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1758b6fb855070413548dad78c964fe6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/afe18bab-d9d9-4256-a8ef-0ccbce8118f1.png?resizew=149)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8704811c9c5dba854310ae0de2ba6b05.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c14a66ed4bd66df65bc42c4ac1ed15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9786d2ec9acadce968ce77d33d120d68.png)
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【推荐1】如图,在多面体
中,四边形
和
都是直角梯形,
,
,
,
平面
,
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/2017/4/13/1664904656240640/1665646931787776/STEM/f8f0ca583e6f4fbaacdd01abf6d151ff.png?resizew=192)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773e873ea0eb2c488fc02ab065e538a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5de031ade6df38cbc4ccd52cac380c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d31600cba2d5256c7e78b6122d6755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fc716e044145dbcd73e72dbeba4b60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0e5697eca3f5205cb7b343648240bf.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/77091ac5160b6a5655caf4b5f6d51021.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/476a9664b27f7439e7b05e92a6baec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/2017/4/13/1664904656240640/1665646931787776/STEM/f8f0ca583e6f4fbaacdd01abf6d151ff.png?resizew=192)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d32e76582bf550593fdef53e081225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e106f4233be16e98f2c1bf9f1635622.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e735d5b9d05ab75eb9c28fcd51598d6d.png)
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名校
【推荐2】如图,在四棱锥
中,底面
为梯形,
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/1c60e0c7-4a1c-44aa-af57-36f54cc86be0.png?resizew=193)
(1)证明:
;
(2)若
为正三角形,求二面角
的正弦值.
![](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/b2b2c8a2fccdf06f8193b5ad76787478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d349fe863291b79f668a038ec1fc41e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/1c60e0c7-4a1c-44aa-af57-36f54cc86be0.png?resizew=193)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccbd1316b9d1f0c1e71fd078deec61f6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08fa5b7ee3c02add5668fcdfd13e4b6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a4bddf1ea3c5d37f2233a4821909e9.png)
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适中
(0.65)
【推荐3】如图,在长方体
中,
,
是底面
的中心.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/a654265b-e9f7-48e2-8943-6815f729516f.png?resizew=151)
(Ⅰ)求证:
平面
;
(Ⅱ)求二面角
的平面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3054bfbd706c492cba96b09d5780e2aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/a654265b-e9f7-48e2-8943-6815f729516f.png?resizew=151)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a00b45e6a59d21fb0b0478ca3b6818b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7977ab975efa6411cc17de39be70d9.png)
(Ⅱ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc741de0ca651a0f3ef1974c3bb52bb6.png)
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名校
【推荐1】已知底面为正方形的四棱柱
,
,
,E,F,H分别为
,
,
的中点,
的面积为4,P为直线FH上一动点且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/3d690777-99fa-4d19-9d6b-923c9231b088.png?resizew=185)
(1)求证:当
时,
;
(2)求多面体
的体积;
(3)是否存在实数
,使得线段BP与平面
夹角余弦值为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/049ad1f85ee1c1352a7eb4e409253226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a62baf85689a2bb94b1ab7a2ab9863e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284750727aa2c32b2477d126daefb329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d42170c7d4249f6b390823606c18c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ce79872645a3417d648e0b6c73bea7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/3d690777-99fa-4d19-9d6b-923c9231b088.png?resizew=185)
(1)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500d68f2678989a5ce7431cfd51b019d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d09a88dc7dc9cd668a57138e1ec71ea2.png)
(2)求多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94569e839ce7df9c5d113255e82fa983.png)
(3)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6188dd1bd2be736144956d4aa632c239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e6486784415f3537c9a13556c05d893.png)
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解题方法
【推荐2】如图,四棱锥
中,
底面ABCD,且底面ABCD为平行四边形,若
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/7f20a2ab-04fa-458d-b3fa-6bde5d9a81c4.png?resizew=170)
(1)求证:
;
(2)若
,求直线PB与平面PCD所成角的正弦值.
![](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/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/7f20a2ab-04fa-458d-b3fa-6bde5d9a81c4.png?resizew=170)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b07e317ffe7859e81b42ef4970e344a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/068e62c79ff7a527ff494db199d40b50.png)
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