2010·河北保定·一模
解题方法
1 . 设函数![](https://img.xkw.com/dksih/QBM/2010/8/20/1569818736173056/1569818741260288/STEM/f2fae7376df04dc5807c82eb3607d052.png)
(1)求
的最小正周期与单调递减区间;
(2)在△ABC中,a、b、c分别是角A、B、C的对边,已知
,△ABC的面积为
的值.
![](https://img.xkw.com/dksih/QBM/2010/8/20/1569818736173056/1569818741260288/STEM/f2fae7376df04dc5807c82eb3607d052.png)
(1)求
![](https://img.xkw.com/dksih/QBM/2010/8/20/1569818736173056/1569818741260288/STEM/78169a8e5f4b47dd919d098d9717c905.png)
(2)在△ABC中,a、b、c分别是角A、B、C的对边,已知
![](https://img.xkw.com/dksih/QBM/2010/8/20/1569818736173056/1569818741260288/STEM/15b4baa8990845d8aed25c261bd11e84.png)
![](https://img.xkw.com/dksih/QBM/2010/8/20/1569818736173056/1569818741260288/STEM/380fd71d73d14c32ad2e6aa4220defef.png)
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