名校
解题方法
1 . 记正四棱柱
为
,截面
将正四棱柱
分成两部分,点E,F,G,H分别在棱
,
,
,
上,且
,
,记
,
,
,
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f09757d013574cf058d5bb944fdf034a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb9458b63a4e8425c6f59e0e37887d6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/681e6304ec3b733adde692837bf2602a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17eb884c0e7414be81990409dba252f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28bc8a47c5268ebfc7329b3398bb9f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/463c91e95bf032d464b20f0c53f39d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6125e6e8d7406d54c93512a9fb2cbbe.png)
A.四边形![]() |
B.![]() |
C.若截面![]() ![]() ![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() ![]() |
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名校
2 . 如图,圆台
的轴截面为等腰梯形
,
,B为底面圆周上异于A,C的点.
内,过
作一条直线与平面
平行,并说明理由;
(2)设平面
∩平面
,
与平面QAC所成角为
,当四棱锥
的体积最大时,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e53b212640dadf751ef7f65a78a209.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b8c6d80251fdeabfebd65bca460d55b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f664c0db517bec6886ff0b6100fd474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc9ffc43a56921fe79f8602636b8b0f.png)
(2)设平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc9ffc43a56921fe79f8602636b8b0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0bd886276f8ff9df2a42013b337d726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29a0c82028e1259f300facd32775a15e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52c6c1f6d821af7e3c8058993218a861.png)
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2023-02-25更新
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8卷引用:安徽省合肥一六八中学等学校2024届高三上学期名校期末联合测试数学试题
名校
3 . 如图,
是半球的直径,
为球心,
依次是半圆
上的两个三等分点,
是半球面上一点,且
,
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992657885069312/2994303654756352/STEM/a8454b57-25b9-4515-8ac4-e5e4472e5be3.png?resizew=249)
(1)证明:平面
平面
;
(2)若点
在底面圆内的射影恰在
上,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c6eff038537d5fdae6e9741e2bd9dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c16bb6dfa23ed5b89e42c95ce0590eae.png)
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992657885069312/2994303654756352/STEM/a8454b57-25b9-4515-8ac4-e5e4472e5be3.png?resizew=249)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d24305d21268a9b67cf6a8daae6bbe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6b79de40c8517ab2650999401d7c3c.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f42a997b72568fa71bd29bedd8be6f1.png)
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2022-06-04更新
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6卷引用:安徽省合肥六校联盟2022-2023学年高一下学期期末联考数学试卷
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