13-14高三上·河北保定·阶段练习
解题方法
1 . 已知向量
函数
.
(1)求函数
的最小正周期及单调递减区间;
(2)在锐角
中,
的对边分别是
,且满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4910b631b05897b01c3c994153ea4968.png)
求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/293971e2179d80c0a5fa8ced538ca069.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bd729825112a26d4b2fa52d96cdb081.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)在锐角
![](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/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4910b631b05897b01c3c994153ea4968.png)
求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d281c59a15f75999c7dd0de5da413deb.png)
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