1 . 如图,P为△ABC所在平面外一点,AP=AC,BP=BC,D为PC中点,直线PC与平面ABD垂直吗?为什么?
![](https://img.xkw.com/dksih/QBM/2016/3/8/1572526158503936/1572526164516864/STEM/f303e38a3e52466bb80ace5ab95c3e75.png)
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2 . 已知
是两条不同的直线,
是两个不同的平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bdb900b1e583a7ad651daa57b54d33e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef7cce77456897b0567f34fd2baf5eb1.png)
A.若![]() ![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() ![]() |
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3 . 在梯形ABCD中,AD∥BC,BC=2AD,AD=AB=
,AB⊥BC,如图把△ABD沿BD翻折,使得平面ABD⊥平面BCD.
![](https://img.xkw.com/dksih/QBM/2016/1/25/1572464722821120/1572464728989696/STEM/8ec1482a5be64bb0976801ea80321912.png)
(Ⅰ)求证:CD⊥平面ABD;
(Ⅱ)若点M为线段BC中点,求点M到平面ACD的距离.
![](https://img.xkw.com/dksih/QBM/2016/1/25/1572464722821120/1572464728989696/STEM/ed603cd4d8514513a9ce4d9699f3f2fb.png)
![](https://img.xkw.com/dksih/QBM/2016/1/25/1572464722821120/1572464728989696/STEM/8ec1482a5be64bb0976801ea80321912.png)
(Ⅰ)求证:CD⊥平面ABD;
(Ⅱ)若点M为线段BC中点,求点M到平面ACD的距离.
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4 . 在三棱锥P-ABC中,
,PA⊥平面ABC.
![](https://img.xkw.com/dksih/QBM/2016/4/29/1572608627359744/1572608633561088/STEM/e5c00715877042719c8bc4efe37bea4c.png)
(1)求证:AC⊥BC;
(2)如果AB=4,AC=3,当PA取何值时,使得异面直线PB与AC所成的角为600.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f12af6c5c7f979f77a80304c54b9ba94.png)
![](https://img.xkw.com/dksih/QBM/2016/4/29/1572608627359744/1572608633561088/STEM/e5c00715877042719c8bc4efe37bea4c.png)
(1)求证:AC⊥BC;
(2)如果AB=4,AC=3,当PA取何值时,使得异面直线PB与AC所成的角为600.
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5 . 如图,已知菱形ACSB中,∠ABS=60°.沿着对角线SA将菱形ACSB折成三棱锥S﹣ABC,且在三棱锥S﹣ABC中,∠BAC=90°,O为BC中点.
![](https://img.xkw.com/dksih/QBM/2016/1/25/1572464722821120/1572464729006080/STEM/2aa3de03a1ca4f87b080fe6ec323b38d.png)
(Ⅰ)证明:SO⊥平面ABC;
(Ⅱ)求平面ASC与平面SCB夹角的余弦值.
![](https://img.xkw.com/dksih/QBM/2016/1/25/1572464722821120/1572464729006080/STEM/2aa3de03a1ca4f87b080fe6ec323b38d.png)
(Ⅰ)证明:SO⊥平面ABC;
(Ⅱ)求平面ASC与平面SCB夹角的余弦值.
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6 . 如图,在长方体
中,
,AB=2,点E是线段AB的中点.
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493694836736/1572493700628480/STEM/7ca12627e72a42c997eeab59b200bb0a.png)
(1)求证:
;
(2)求二面角
的大小的余弦值.
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493694836736/1572493700628480/STEM/e656584afafc4d7e96d8037895fe13cb.png)
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493694836736/1572493700628480/STEM/924c3854afe1497e89590e9de9fdd5d9.png)
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493694836736/1572493700628480/STEM/7ca12627e72a42c997eeab59b200bb0a.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493694836736/1572493700628480/STEM/327512039a3d423491de35753bf8b85c.png)
(2)求二面角
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493694836736/1572493700628480/STEM/d173dc7994e5424f97dc8b52de60345f.png)
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7 . 如图,设四棱锥
的底面为菱形,且∠
,
,
.
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572074347175936/1572074353229824/STEM/57544d4f263444709a1aa951e78ca4c4.png)
(1)求证:平面
平面
;
(2)求平面
与平面
所夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5aa0d36da718de7c50a781b8e2bb8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/014eba54dcec9103a76a52d00dd935bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef86eedcd7a38e3a244ec3c5616eb26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27697383fc4fff764df9e066650d8b2b.png)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572074347175936/1572074353229824/STEM/57544d4f263444709a1aa951e78ca4c4.png)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26e8c821241c889fe7ddc5ca48ff54f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14f0106a1329dfce39bb51ae7c9c74ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c610eab074474dc50696f6c482f7297.png)
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2016-12-03更新
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203次组卷
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2卷引用:2015届陕西西安长安区一中高三上学期第三次检测理科数学卷