解题方法
1 . 已知条件:①
;②
;③
.在这三个条件中任选一个,补充在下面的问题中,并解答.问题:在
中,角
,
,
,满足:______.注:如果选择多个条件分别作答,按第一个解答计分.
(1)求角
的大小;
(2)若
为锐角三角形,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c61f1584aad927592754820507aebe47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b55f457df23ba7550e4489a9a6dca9c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba8ed5f98c366e9b8576daffb685f602.png)
![](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)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b190349665d3c40f2954d6f1c8926ae.png)
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