名校
解题方法
1 . 如图,在直三棱柱
中,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/779992f0-3fd8-45a6-a845-520c38893c99.png?resizew=151)
(1)求证:
;(用向量方法证明)
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/779992f0-3fd8-45a6-a845-520c38893c99.png?resizew=151)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/429228f882da65a8e0064c88d02b8e40.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea848cd2aa3a464618020475097949fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
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2 . 在平面直角坐标系xOy中,已知圆
与抛物线
交于点M,N(异于原点O),MN恰为该圆的直径,过点E(0,2)作直线交抛物线于A,B两点,过A,B两点分别作抛物线C的切线交于点P.
(1)求证:点P的纵坐标为定值;
(2)若F是抛物线C的焦点,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de31b90e560fd399072cddf77cee65a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82ea1be9b9b6bb12afa7e1ce703d1603.png)
(1)求证:点P的纵坐标为定值;
(2)若F是抛物线C的焦点,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2257268f137854f2551a77c50068482f.png)
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名校
3 . 汽车前灯反射镜曲面设计为抛物曲面(即由抛物绕其轴线旋转一周而成的曲面).其设计的光学原理是:由放置在焦点处的点光源发射的光线经抛物镜面反射,光线均沿与轴线平行方向路径反射,而抛物镜曲面的每个反射点的反射镜面就是曲面(线)在该点处的切面(线).定义:经光滑曲线上一点,且与曲线在该点处切线垂直的直线称为曲线在该点处的法线.设计一款汽车前灯,已知灯口直径为20cm,灯深25cm(如图1).设抛物镜面的一个轴截面为抛物线C,以该抛物线顶点为原点,以其对称轴为x轴建立平面直角坐标系(如图2)抛物线上点P到焦点距离为5cm,且在x轴上方.研究以下问题:
(2)求P点坐标.
(3)求抛物线在点P处法线方程.
(4)为证明(检验)车灯的光学原理,求证:由在抛物线焦点F处的点光源发射的光线经点P反射,反射光线所在的直线平行于抛物线对称轴.
(2)求P点坐标.
(3)求抛物线在点P处法线方程.
(4)为证明(检验)车灯的光学原理,求证:由在抛物线焦点F处的点光源发射的光线经点P反射,反射光线所在的直线平行于抛物线对称轴.
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4 . 如图,在棱长为2的正方体
中,
,
,
分别为
,
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/f23da952-6096-44a7-866d-aa236160eecb.png?resizew=169)
(1)求证:
平面
;
(2)试在棱
上找一点
,使
平面
,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/f23da952-6096-44a7-866d-aa236160eecb.png?resizew=169)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e2fef2c0e49ecae8688ca60802310e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
(2)试在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d0492b25f10ae45c39f8e9838519259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
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2022-03-27更新
|
155次组卷
|
4卷引用:福建省仙游县枫亭中学2019-2020学年高二上学期期末考试数学试题
福建省仙游县枫亭中学2019-2020学年高二上学期期末考试数学试题山东省东营市广饶县第一中学2022-2023学年高二上学期10月月考数学试题山西省临汾市洪洞县向明中学2023-2024学年高二上学期第一次月考数学试题(已下线)专题03空间向量及其运算的坐标表示(5个知识点4种题型1个易错点)(2)
名校
解题方法
5 . 在正四棱柱
中,
,E为
的中点.(用向量的方法证明)
![](https://img.xkw.com/dksih/QBM/2021/12/23/2883777674158080/2929070225489920/STEM/178a81b3-47b8-4fa0-a592-fc7d95a5ce39.png?resizew=152)
(1)求证:
平面
.(用向量的方法证明)
(2)若F为
上的动点,使直线
与平面
所成角的正弦值是
,求BF的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f21c7c194c5bc2986a21fd441c81495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/2021/12/23/2883777674158080/2929070225489920/STEM/178a81b3-47b8-4fa0-a592-fc7d95a5ce39.png?resizew=152)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4557a368725226f2c8ea2efb7d30e478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)若F为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f348ed8a1690d3ed02aa64459ca50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
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2022-03-04更新
|
146次组卷
|
2卷引用:吉林省汪清县汪清第四中学2021-2022学年高二上学期第一次阶段检测数学试题
6 . 我们把椭圆
和
称为“相似椭圆”“相似椭圆”具有很多美妙的性质.过椭圆
上任意一点P作椭圆
的两条切线,切点分别为A、B,切线
、
与椭圆
另一个交点分别为Q、R.
(1)设
,证明:直线
是过A的椭圆
的切线;
(2)求证:点A是线段
的中点;
(3)是否存在常数
,使得对于椭圆
上的任意一点P,线段
的中点M都在椭圆
上,若存在,请求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/334b2f08ae57ef13a2ab9226daf33e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1d4055c5517cd4f502e174396dd46db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4f150ab98bde511e0f65d9bafab031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522230546d4b802094e86ceb48c2ba38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4f150ab98bde511e0f65d9bafab031.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db0d7f1b7a63446dc12e030757f434a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522230546d4b802094e86ceb48c2ba38.png)
(2)求证:点A是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(3)是否存在常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4f150ab98bde511e0f65d9bafab031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d7b816eca15d4b7d060013df53edd53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522230546d4b802094e86ceb48c2ba38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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名校
解题方法
7 . 在平面直角坐标系
中,对于直线
和点
、
,记
,若
,则称点
、
被直线
分隔,若曲线
与直线
没有公共点,且曲线
上存在点
、
被直线
分隔,则称直线
为曲线
的一条分隔线.
(1)判断点
是否被直线
分隔并证明;
(2)若直线
是曲线
的分隔线,求实数
的取值范围;
(3)动点
到点
的距离与到
轴的距离之积为
,设点
的轨迹为曲线
,求证:通过原点的直线中,有且仅有一条直线是
的分隔线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29fa0e0526598c4140789f6328daac9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3653fe002a6d9968d6b1d2e7ec36d178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4869bf9983f59598ca7954fd7e89b66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0b3d5b330a1e9746267f1a80482e435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5a93e8201cd8010f841a105bc9afd99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)判断点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a76e726cd6ff947e0ae20c07ebfa8bf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0985b973395bcd371cd1e26d3fcd1c36.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac02a054bd0771a56987af33454baaea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/348aca26e61218d251581e21c1129a8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b378e03d75c73c8ca71f991a8c07729a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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解题方法
8 . 在三棱柱
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
平面
,
分别为
的中点,
.
![](https://img.xkw.com/dksih/QBM/2021/10/13/2828421454585856/2828718672060416/STEM/50d69960c34a494091bd5eeb9de0a74e.png?resizew=177)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
平面
;
(2)证明:直线
与平面
相交.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46516d41dadbc2af56b681dcd5f15a85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a898391acfefad6656a81913f51d0255.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2efe30b0b1a3b0c49b4fa58b7cce943b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc9b17d5fe8e039d5de1f195b7202778.png)
![](https://img.xkw.com/dksih/QBM/2021/10/13/2828421454585856/2828718672060416/STEM/50d69960c34a494091bd5eeb9de0a74e.png?resizew=177)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
(2)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
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2022高三·全国·专题练习
解题方法
9 . 如图,在多面体
中,四边形
为直角梯形,
,
,
,
,四边形
为矩形.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/2b0ebbd9-62c5-427f-8613-1bfa1215639a.png?resizew=163)
(1)求证:平面
平面
;
(2)线段
上是否存在点
,使得二面角
的余弦值为
?若不存在,请说明理由.若存在,确定点
的位置并加以证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c162736b719327a2acd7c4d313e1d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/699fc9b7e879af4866aaa07848dfb423.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/479bb5e937f4fdb1fcbca229e62e0e80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d26f819a0677f507283ccb157dc0c1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/941ae54e27bcb5c3909350049f2afd85.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/2b0ebbd9-62c5-427f-8613-1bfa1215639a.png?resizew=163)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bb5012f6c70a1e98d682b6d021fadd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa14a5c8a3c0cbd3a0ab5752957ddc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dedfba8b9447a4db53baae62fdeebfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
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名校
10 . 如图,三棱柱
中,侧面
为矩形,若平面
平面
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/ea941d1a-dc83-4dd2-a7f7-beceaffe880d.png?resizew=147)
(1)求证:
;
(2)记平面
与平面
所成角为
,直线
与平面
所成角为
,异面直线
与
所成角
,试探求
与
的大小关系,并给出证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eff0db05826cbff651faf0144904b32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eff0db05826cbff651faf0144904b32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea848cd2aa3a464618020475097949fc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/ea941d1a-dc83-4dd2-a7f7-beceaffe880d.png?resizew=147)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82343ddf8316e0a9a50c21c422bdc930.png)
(2)记平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea848cd2aa3a464618020475097949fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32ffad8405936ce486b0068524b67e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0abfb55e8443ecf97535f8e189a76c60.png)
您最近一年使用:0次
2022-01-11更新
|
134次组卷
|
2卷引用:湖北省新高考联考协作体2021-2022学年高三上学期11月联考数学试题