1 . 在
中,角
所对的边分别为
,c.已知
.
(1)求角
;
(2)若
,求
的值;
![](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/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fd20a17f389cf24dd9495bbf683f3e7.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1421805ef3a282c4e4e52c6077d5c650.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bccf52821c16998d70ae82ae0127d296.png)
您最近一年使用:0次
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2 . 已知函数
的最小正周期为
.
(1)求
的值,并求函数
的单调递减区间;
(2)已知
,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28c356c1f54bfe257a60bf54fe18b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34b18fdbddb778d2cc45107488740210.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/823c1e12de5a2a622f19d18e1e25fa0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4909caa0b00967e262c5f944718f8480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d572f36ef704e7aa455c5f31fb926cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19bbc94cfd741372d95b5708ca4ef1da.png)
您最近一年使用:0次
2022-10-20更新
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770次组卷
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4卷引用:天津市第二南开学校2024届高三上学期10月阶段评估数学试题