解题方法
1 . 若α为锐角,且
,则cos2α=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c40d42418fab54807efb85a00ef8de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
2 . 若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c848284ac088e1336010adb58b3ad31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497050a43886c58422c6ed071348ffc2.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 已知函数
的图象关于点
对称,若当
时,
的最小值是
,则
的最大值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e0a58a3197548482162707f8aa0c4db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c84e2a02b32a01b13d65e5e9c4554c59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c91675537f467e914d234baa216245be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
4 . 在
中,内角A,B,C所对的边分别为a,b,c.若
,则A等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fe839d257c335907329af137f1ca069.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 已知函数
,若
且
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d672d0d8b0849975a427700acb49b424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06f542520ba0291df95622b84c697ef9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05d8442c7566625949037a561849d111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
A.11 | B.5 | C.9 | D.7 |
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解题方法
6 . 在
中,角
的对边分别是
,若
,则
的形状为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bffc0212243506cf4ef7dba94ef23f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
A.等腰三角形 | B.锐角三角形 | C.直角三角形 | D.钝角三角形 |
您最近一年使用:0次
解题方法
7 . 如图(1),在梯形
中,
,
,点
在边
上,且四边形
是正方形,现将正方形
沿直线
折起,使得平面
平面
,得到如图(2)所示的三棱锥
.若
是棱
的中点,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4864c21e9664fa9111ede6425b09563a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58da8c45280be1a7f15730f0c7900989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e668c528702b7b13f7b02fa859b0fab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0568f3154ff5f3f7b374a2f84db403ba.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
解题方法
8 . 已知角
的顶点与坐标原点重合,始边点x轴的非负半轴重合,终边上一点的坐标为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180954b0b5349743c54372b17d538f57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27ae3a7d4f440b1c544bf36363eb7a51.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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昨日更新
|
203次组卷
|
2卷引用:东北三省部分学校2024届高三下学期押题考试(二)数学试卷
名校
解题方法
9 . 记
的内角
的对边分别为
为
上一点,且
.
,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fc1540cb6983b728dc877b8f9f7fdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0124a1b3f5f842d47bfd519ff1ba6015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/444ff91027cd44acd2834c85aa3b0ce2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.8 | B.9 | C.12 | D.14 |
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解题方法
10 .
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b047198608ca5d68846ee83fd1a0e9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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