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1 .
中的内角A,B,C所对的边分别为a,b,c.已知
.
(1)求角A;
(2)若
,
,求a.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac740f3ae261100263c7a4b0a0176a65.png)
(1)求角A;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3320a13248a3a1208ff6ee85c9d26f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de1d395e6c48c0676a1488a299479d9.png)
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2020-03-13更新
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2卷引用:2019年安徽省普通高中学业水平考试数学试题