名校
1 . 如图,点A,B是单位圆上分别在第一、二象限的两点,点C是圆与
轴正半轴的交点,△AOB是正三角形,若点A的坐标为(
,
),记∠COA=α.
![](https://img.xkw.com/dksih/QBM/2016/11/26/1573187448020992/1573187453689856/STEM/c7a490fa08e04667adf01671696a76a9.png)
(Ⅰ)求
的值;
(Ⅱ)求cos∠COB的值
![](https://img.xkw.com/dksih/QBM/2016/11/26/1573187448020992/1573187453689856/STEM/a3b2834f8af8423da0cfd7e00565ab9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7294f5ae2a24ff42e84cd9773b2a7287.png)
![](https://img.xkw.com/dksih/QBM/2016/11/26/1573187448020992/1573187453689856/STEM/c7a490fa08e04667adf01671696a76a9.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5df0bfcbd732afa9b0add1d2b03a7a4d.png)
(Ⅱ)求cos∠COB的值
您最近一年使用:0次
2016-12-05更新
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6卷引用:2017届海南省海南中学高三上月考三数学(文)试卷
2 . 已知函数
.
(1)求函数
的最小正周期;
(2)求函数
在
上的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90a4f793cec5b178f3eaac45a4341589.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0b4c6bff4186397c16d47334436027a.png)
您最近一年使用:0次
2016-12-04更新
|
1046次组卷
|
2卷引用:2016届海南中学高三考前高考模拟十一文科数学试卷