在
中,角A、B、C的对边分别为a、b、c,且
.
(1)求角A的大小;
(2)若
,
的平分线与
交于点D,与
的外接圆交于点E(异于点A),
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9877f7d6f173625d17e9000add43f8f1.png)
(1)求角A的大小;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edac22de32695706a22317036915653d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55881285c3bea9e25144254cf2037540.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
更新时间:2020-04-24 15:44:11
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解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐1】已知函数
.
(1)若
的周期为
,且
的三个内角
所对的边分别是
,满足
,
,
,求
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(2)若
在
上恰有两个零点,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a35efc13fce41060432149f41c14c0.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f5389990c3a0c5373f3bd9fb2454c9.png)
![](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/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/003e28d41ed93a2bca52192faed28519.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e245411397acbba561c9733b3ec9c55f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97661ec75a6e3c3bc7d2234f83ae3aeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fed440b9f974492068a68203e5029f98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
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(0.65)
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【推荐2】在
中,内角A,B,C的对边分别为a,b,c,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b823f3431a6dd92fa8f7039cf2dbbef.png)
(1)求角C;
(2)若
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882589c896c6993d9687f0e14a283481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b823f3431a6dd92fa8f7039cf2dbbef.png)
(1)求角C;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f257943b2e66a23bc9135f0a7c652be7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882589c896c6993d9687f0e14a283481.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐1】记△ABC的内角A,B,C的对边分别为a,b,c,且
.
(1)若
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(2)求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a27418aa9de58f2e64debae815e6c6.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66afcba83333c32d82299a5c7bfb6d96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0da6ad4487944da9e797838539d3362c.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1db906824e53395f016622f21efdb11.png)
您最近一年使用:0次
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适中
(0.65)
【推荐2】在△ABC中,A,B,C的对边分别为
,且
.
(1)求B的大小;
(2)若△ABC的面积为
,且a+c=6,求b.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da2a72e5d313993c3b66e1cd9cb312f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d72f2459e276be479a89e3a428fa236.png)
(1)求B的大小;
(2)若△ABC的面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
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