已知
的内角A,B,C的对边分别为a,b,c,且
.
(1)求C;
(2)若
,求a.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc365d7037709240df6c31f203bd4472.png)
(1)求C;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b6a7d6647266ceb1da1483f75ec6a96.png)
更新时间:2021-11-13 13:07:32
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【推荐1】已知
中,内角A,B,C所对的边分别为a,b,c,且
.
(1)若
,求
外接圆的面积;
(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd6a35a593300e8eff37e8584d09a3c4.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4580cc037c0c760c728cdbb74a8154c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
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【推荐2】已知
分别为
三个内角
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
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(1)求
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7d73cf88f1d65d4cf04d2953ebc230.png)
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【推荐1】在
中,角
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4e7fcf66fcdc1b79062ac056d15e2c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1110559eaac39a016c95880c08de39f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57003e380cf41982c78289db1c4d68fa.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611ac9d3f040cef52e4559267fd7b632.png)
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【推荐2】如图所示,四边形OAPB中,OA⊥OB,PA+PB=10,∠PAO=∠PBO,∠APB=
,设∠POA=,△AOB的面积为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a92aa60c9f471346aa06436f18e22f54.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3b9a20c31e397ae1dc8a44baf7de91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a92aa60c9f471346aa06436f18e22f54.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/5cce12fa-d51d-496a-91e8-4179d1f55fdc.png?resizew=109)
(1)用表示OA和OB;
(2)求△AOB面积S的最大值.
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