在
中,设角A,B,C的对边分别为a,b,c,且满足
.
(1)求角B的大小;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9405b6ba33ff1b5c71402f6be9cad93.png)
(1)求角B的大小;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f437c325c9f5f585296b60d6d683847e.png)
更新时间:2019-09-18 21:03:22
|
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解答题-问答题
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适中
(0.65)
真题
解题方法
【推荐1】设函数
,其中,角
的顶点与坐标原点重合,始边与
轴非负半轴重合,终边经过点
,且
.
(1)若点
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,求
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(2)若点
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上的一个动点,试确定角
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(1)若点
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cce1eb4eff124570110d95185e657c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd288d4152caf5fc8187a1a901c8949f.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8701e0cce437edc830438b4fe6277d89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f1f530fd52139840572734278fd7bab.png)
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(2)求
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(3)求
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【推荐3】已知向量
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(2)若
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解答题-证明题
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适中
(0.65)
【推荐1】我们定义把
叫做
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,
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【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aef956af683d7eb9fdcc23fbf96d541a.png)
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的最小正周期及单调递增区间
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(1)求函数
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(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e38844d9998a21f63551955e75880b4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f63dc02238b087ff47e9aa5bf6759d.png)
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【推荐1】如图,一条东西流向的笔直河流,现利用监控船
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、
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在
的正西侧).监控中心C在河流北岸,测得
,
,
,监控过程中,保证监控船D观测A和监控中心C的视角为
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的长度;
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(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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【推荐2】在△ABC中,角A、B、C所对的边分别为a、b、c,
.
(1)求角A;
(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd86169bc4739fc440dd810423733eb7.png)
(1)求角A;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fadd2e6f0aa16c2c466c904474ffc79c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980ab4deb9e7f2bc9288787f5243a4d2.png)
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解题方法
【推荐1】在
中,角A,B,C所对的边分别为a,b,c,
,
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(1)求角C;
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边上的点P满足
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(1)求角C;
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2700a3103aef7c7cdb1ab54bf964639b.png)
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解题方法
【推荐2】在
中,角
,
,
所对的边分别为
,
,
,满足
.
(1)求
的大小;
(2)若
,求
面积
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a67ee9b2cab5f16ceb31b2fb1b8862c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
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