1 . 如图,矩形
所在的平面与等边
所在的平面垂直,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2015/11/9/1572283446231040/1572283452358656/STEM/783a21cba3034167a023ebf238eaa4d9.png)
(1)求证:
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56a73d381aab499a5c0a5e81cee02efd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2015/11/9/1572283446231040/1572283452358656/STEM/783a21cba3034167a023ebf238eaa4d9.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94797c3647d8d188f655772f01864ce.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/114535a0f82dbb18dae843f6f191a87d.png)
您最近一年使用:0次
2 . 如图,在棱长为
的正方体
中,点
是棱
的中点,点
在棱
上,且满足
.
![](https://img.xkw.com/dksih/QBM/2014/3/31/1571591338311680/1571591343652864/STEM/75d2bbccc4ae4ec18050cac1fd243dc3.png)
(1)求证:
;
(2)在棱
上确定一点
,使
、
、
、
四点共面,并求此时
的长;
(3)求平面
与平面
所成二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8456cee87c4e22351affc28f3a73a0f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e3334853138fb74687d66b1e45f2fd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1859959fdb4c5edd8056893f94a10a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b74e3ad474d589ef154dbcda5caaa17.png)
![](https://img.xkw.com/dksih/QBM/2014/3/31/1571591338311680/1571591343652864/STEM/75d2bbccc4ae4ec18050cac1fd243dc3.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed33744c92e7600d4f2642ec0892560.png)
(2)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e97fcdcfd6183b976a61ef3222c607.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fec5bd77cfc1313bc200480cc66c766.png)
(3)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
11-12高二上·广东·期中
名校
解题方法
3 . 如图,在三棱锥P﹣ABC中,E,F分别为AC,BC的中点.
(1)求证:EF∥平面PAB;
(2)若平面PAC⊥平面ABC,且PA=PC,∠ABC=90°,求证:平面PEF⊥平面PBC.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/14/00199af2-9023-45c7-afc6-8b6f3d2bf55e.png?resizew=158)
(1)求证:EF∥平面PAB;
(2)若平面PAC⊥平面ABC,且PA=PC,∠ABC=90°,求证:平面PEF⊥平面PBC.
您最近一年使用:0次
2016-12-04更新
|
598次组卷
|
9卷引用:2011-2012学年度广东省东山中学高二第一学期期中理科数学试卷
(已下线)2011-2012学年度广东省东山中学高二第一学期期中理科数学试卷(已下线)2011-2012学年福建省福安一中高一下学期第一次月考数学试卷(已下线)2011-2012学年江西省会昌中学高一下学期第二次月考文科数学试卷2015-2016学年湖南省邵阳市邵东县高一上学期期末数学试卷(已下线)2018年11月25日 《每日一题》人教必修2-每周一测浙江省嘉兴市南湖区第一中学2019-2020学年高二上学期期中数学试题山东省泰安市2020-2021学年高一下学期期末数学试题山东省东营市广饶县第一中学三校区2022-2023学年高二9月月考数学试题山东省临沂市蒙阴县第一中学2022-2023学年高一下学期第二次月考数学试题
4 . 如图所示,四边形ABCD是菱形,O是AC与BD的交点,SA⊥平面ABCD
![](https://img.xkw.com/dksih/QBM/2016/3/8/1572526348410880/1572526353981440/STEM/93f3aaa998b54c09979319075893db33.png)
(Ⅰ)求证:平面SAC⊥平面SBD;
(Ⅱ)若∠DAB=120°,DS⊥BS,AB=2,求SO的长及点A到平面SBD的距离.
![](https://img.xkw.com/dksih/QBM/2016/3/8/1572526348410880/1572526353981440/STEM/93f3aaa998b54c09979319075893db33.png)
(Ⅰ)求证:平面SAC⊥平面SBD;
(Ⅱ)若∠DAB=120°,DS⊥BS,AB=2,求SO的长及点A到平面SBD的距离.
您最近一年使用:0次
5 . 如图,在四棱锥
中,底面
是平行四边形,
,
.
平面
,点
为
的中点.
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572508766109696/1572508772499456/STEM/53538468f5d14d4cbbc6931298ddb7fa.png)
(1)求证:
平面
;
(2)求证:
.
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572508766109696/1572508772499456/STEM/04d2743b90bd4921950ca7a78032e3fc.png)
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572508766109696/1572508772499456/STEM/2ca574a4391c4f0c858ac26d32435156.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96063ea9fc9a250257cf3cd20a55cf89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4e4a162f12d12a082b8d8fdd1aeab9.png)
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572508766109696/1572508772499456/STEM/6bcf2f7d1a1d4e5c9de993cbd010fcc6.png)
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572508766109696/1572508772499456/STEM/2ca574a4391c4f0c858ac26d32435156.png)
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572508766109696/1572508772499456/STEM/2cbaadeabca444a29061c2c4ad75cdca.png)
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572508766109696/1572508772499456/STEM/c6251dfa389f4ed180df7583e6462a0d.png)
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572508766109696/1572508772499456/STEM/53538468f5d14d4cbbc6931298ddb7fa.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572508766109696/1572508772499456/STEM/8ba496e5e36d428d971bb8ff5affa940.png)
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572508766109696/1572508772499456/STEM/b89625c897b64a8aa46cfa29460c33a0.png)
(2)求证:
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572508766109696/1572508772499456/STEM/997a1e0136ce402fb2b02ccc4c8753d5.png)
您最近一年使用:0次
6 . 在如图的多面体中,EF⊥平面AEB,AE⊥EB,AD∥EF,EF∥BC,BC=2AD=4,EF=3,AE=BE=2,G是BC的中点.
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572462281269248/1572462287331328/STEM/a677a6ec39c6487db4f439213e599586.png)
(Ⅰ)求证:AB∥平面DEG;
(Ⅱ)求证:BD⊥EG.
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572462281269248/1572462287331328/STEM/a677a6ec39c6487db4f439213e599586.png)
(Ⅰ)求证:AB∥平面DEG;
(Ⅱ)求证:BD⊥EG.
您最近一年使用:0次
7 . 如图,在四棱锥
中,底面
为直角梯形,AD‖BC,
,平面
⊥底面
,Q为AD的中点,M是棱PC上的点,PA=PD=AD=2,BC=1,CD=
.
![](https://img.xkw.com/dksih/QBM/2016/4/6/1578863833063424/1578863833620480/STEM/db3f1d2c4eeb42f9929d3a5005b6e66f.png)
(Ⅰ)求证:平面PQB⊥平面PAD;
(Ⅱ)若二面角M-BQ-C为
,设PM=t
MC,试确定t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6153163fecdf3f410411048428ccaef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf94d9e7788382c5f9060e60f100e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/2016/4/6/1578863833063424/1578863833620480/STEM/db3f1d2c4eeb42f9929d3a5005b6e66f.png)
(Ⅰ)求证:平面PQB⊥平面PAD;
(Ⅱ)若二面角M-BQ-C为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7408f4e5fbc936c79089b25ecb1cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b18d78c40ce368f60208949c5ae3fb.png)
您最近一年使用:0次
2016-12-03更新
|
645次组卷
|
4卷引用:2015届广东省惠州市高三4月模拟理科数学试卷
8 . 如图,四棱锥
中,底面
为平行四边形,
底面
,
是棱
的中点,
且
.
![](https://img.xkw.com/dksih/QBM/2017/9/2/1765395891019776/1766284314329088/STEM/8d6d454cd5a04b7cb0322403aa363d9e.png?resizew=220)
(1)求证:
平面
;
(2)如果
是棱
上一点,且直线
与平面
所成角的正弦值为
,求
的值.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/890c5b938c7a39a891faeaac4d77aee8.png)
![](https://img.xkw.com/dksih/QBM/2017/9/2/1765395891019776/1766284314329088/STEM/8d6d454cd5a04b7cb0322403aa363d9e.png?resizew=220)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf2f0df53aa68c9c334165034788166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e64e76a4c1e5934f51cdca2ffbc8313f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d109733379365295b93c58769d2019.png)
您最近一年使用:0次
2016-12-13更新
|
1590次组卷
|
4卷引用:【校级联考】广东省汕头市达濠华侨中学,东厦中学2019届高三上学期第三次联考数学(理)试题
9 . 如图所示,四边形ABCD是菱形,O是AC与BD的交点,
.
![](https://img.xkw.com/dksih/QBM/2016/4/22/1572601921355776/1572601927516160/STEM/c129d8b508a943ed98166f35c2da04e1.png)
(Ⅰ)求证:
;
(Ⅱ)若
,
, AB=2,求SO的长及点A到平面SBD的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/553c3cdaf0945114985729d0bd7f3ddf.png)
![](https://img.xkw.com/dksih/QBM/2016/4/22/1572601921355776/1572601927516160/STEM/c129d8b508a943ed98166f35c2da04e1.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13a5c692979ef9a21a433e049dae4682.png)
(Ⅱ)若
![](https://img.xkw.com/dksih/QBM/2016/4/22/1572601921355776/1572601927516160/STEM/5488eb3558ba4515993834d76fa41114.png)
![](https://img.xkw.com/dksih/QBM/2016/4/22/1572601921355776/1572601927516160/STEM/95759d467f3c4b149ef978a19b5bdc57.png)
您最近一年使用:0次
10 . 在五棱锥P﹣ABCDE中,PA=AB=AE=2a,PB=PE=2
a,BC=DE=a,∠EAB=∠ABC=∠DEA=90°
![](https://img.xkw.com/dksih/QBM/2016/3/23/1572554505527296/1572554511417344/STEM/fdc4242ad124478a89293f88b1d33b8f.png)
(1)求证:PA⊥平面ABCDE;
(2)求二面角A﹣PD﹣E的正弦值.
![](https://img.xkw.com/dksih/QBM/2016/3/23/1572554505527296/1572554511417344/STEM/54ce5c40c56b4ccba04297b2dcbf474d.png)
![](https://img.xkw.com/dksih/QBM/2016/3/23/1572554505527296/1572554511417344/STEM/fdc4242ad124478a89293f88b1d33b8f.png)
(1)求证:PA⊥平面ABCDE;
(2)求二面角A﹣PD﹣E的正弦值.
您最近一年使用:0次
2016-12-04更新
|
373次组卷
|
2卷引用:2015-2016学年广东省实验中学高二上学期期末理科数学试卷