在
中,角A,B,C的对边分别为a,b,c,若
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db06d6926a9ca29f3468692ba6b2ee15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/114aee9d8b86de9c96c9eb1462e2331a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2024-03-03 20:47:44
|
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单选题
|
适中
(0.65)
解题方法
【推荐1】设
的外接圆半径为
,
分别是内角
的对边,若
依次成等差数列,则
的最大值是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ace74bfb716753490ebe0e740ff5baa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c0ae8e92dd3119d41f2c830ea526516.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c0ae8e92dd3119d41f2c830ea526516.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd1810555c0c28fe352841322b85bbc6.png)
A.6 | B.8 | C.9 | D.11 |
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适中
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【推荐2】已知
,则函数
的值域为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8f5417225ce22cc179ee13db4a09caf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9cc80dc7929866b4cc6e0c6190e958d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐1】在△ABC中,3sinA+4cosB=6,4sinB+3cosA=1,则C等于( )
A.30° | B.150° |
C.30°或150° | D.60°或120° |
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【推荐1】将
的图像向左平移
个单位,再向下平移1个单位,得到函数
的图像,则下列关于函数
的说法中正确的个数是( )
① 函数
的最小正周期是
② 函数
的一条对称轴是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12407802e022e4dbc1a0636085e4c387.png)
③函数
的一个零点是
④函数
在区间
上单调递减
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a8b572640fcecddc74adcb56522750d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
① 函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5946299ed8f8c741a82c8d920e1e206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5946299ed8f8c741a82c8d920e1e206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12407802e022e4dbc1a0636085e4c387.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5946299ed8f8c741a82c8d920e1e206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42b946970cdd9b71ab38024193417464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5946299ed8f8c741a82c8d920e1e206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1676e2055861058171f4377ae827e11a.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
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解题方法
【推荐2】设
是单位圆上三点,若
,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9369aed2d8309af46ac3eaffb9cce537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33c096bd244d7e30e8ef26fb5278aac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80bd4a11c46e29820916a9ba19e1866f.png)
A.3 | B.![]() | C.![]() | D.![]() |
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【推荐1】在
中,
分别是角
的对边长,已知
,现有以下判断:①
不可能等于
;②
;上述结论中,所有正确结论的编号是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/125093b1bbbf44e9a9212889f2250693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980ab4deb9e7f2bc9288787f5243a4d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b184c94e38f1e5dbe750b2168c2a37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/277fb0c604336b04db1ec74eb25cc33c.png)
A.①② | B.② | C.① | D.均不正确 |
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解题方法
【推荐2】在
中,设
,
,
分别为角A,B,C对应的边,若
,且
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/402d3a26ab492a4a366f487c2038ccc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/451f1065521efc101272e4b6bfdce982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e6b107e1056b3746c8142f296c26ec.png)
A.![]() | B.2 | C.3 | D.4 |
您最近一年使用:0次