1.函数的周期是___________________________________.

14.函数y＝的值域是__________________;

取最大值时的集合是______________________________________.

取最小值时的集合是______________________________________.

13.已知,实数的取值范围是______________________.

12.则

11.已知是锐角且,则tan()=____________.

10.已知是锐角且＝_____________________.

9.且则

8.若＝且是第二象限角，则

7.，＝__________________________。

6.已知，，则的值是________________.