在
中,角
,
,
的对边分别为
,
,
,且
.
(1)求
大小;
(2)若
为锐角三角形,且
,求
面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/b7f605560f91ec0ef2e3e2753d559003.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
2023·新疆乌鲁木齐·三模 查看更多[3]
更新时间:2023-04-28 20:52:20
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解答题-问答题
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适中
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解题方法
【推荐2】已知
为非直角三角形,
.
(1)证明:
;
(2)求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a7cdbb3639e8e4e8e846e372f7c0ef.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c18b3802b0eb51b33044bc3b2569baf8.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5201fc26d013f6fb889933c0e32f5c53.png)
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【推荐1】如图,在
中,点
在
边上,
,
.
![](https://img.xkw.com/dksih/QBM/2018/3/28/1912144093421568/1915413238112256/STEM/a538dbfa693047ec86ef24b45fa23961.png?resizew=183)
(
)若
,求
的面积.
(
)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a58a622e2b1a239f2f96aa1501e9799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://img.xkw.com/dksih/QBM/2018/3/28/1912144093421568/1915413238112256/STEM/a538dbfa693047ec86ef24b45fa23961.png?resizew=183)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e19b77c15bdff64b03a92cac5e7598eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bb4b13ef03a5091392a93fa1219f3bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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【推荐2】设△
的面积为
,且
.
(1)求角
的大小;
(2)若
,且角
不是最小角,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a6ce8ddfb6921d0c40347064a0aaa0.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/709c67a44d84977e3dddeffa98e9c298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】A,B,C为三角形ABC的内角,R为三角形ABC外接圆半径,r为△ABC内切圆半径.
(1)求证:tanA+tanB+tanC=tanAtanBtanC(A,B,C
);
(2)求证:
.
(1)求证:tanA+tanB+tanC=tanAtanBtanC(A,B,C
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b89e8d0488405d7ef6044f98d31c8a21.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b42b9ba4534b7864463da1c2a258f8bb.png)
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解答题-证明题
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解题方法
【推荐2】已知
的内角A,
,
的对边分别为
,
,
,
,
.
(1)若
,证明:
;
(2)若
边上的高为
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/f08ce80e91fdf435a8e3ec05be990e9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a58a85fba1f83ba3036b0a988a8d81b.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d71bb4c17a801069b0dec6ce33d3b4d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5528e7af7a80d69178e7db04e64fe0e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
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(0.65)
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【推荐1】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa01eebfe54c1c6f7800f5adff8dc20.png)
求
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若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa01eebfe54c1c6f7800f5adff8dc20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fd19d118df1a4c23316934c4bc7bc6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3290b20e4d53ae2b52d5144f41fb0ea2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3fb2f5a6537d3d27f6755a0a35824cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882589c896c6993d9687f0e14a283481.png)
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【推荐2】已知向量
,且
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(1)求
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(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2724e2a6be0b90ab7cee99d0c6426453.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45cba33594434ad0cb8feb56cb647bce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1d6201ae8b341fe7c2e578429dddcb.png)
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