9.函数对任意有，且，

那么___________________________________.

8.若则_____________________________________.

7.已知是方程的两根，＝_________________.

6.已知均为锐角，，则

5.中，

2.的周期是___________________;值域是___________________.

3.

4已知，则＝___________;＝_____________.

1.

16.已知函数函数的最小值是____________;函数的最大值是____________________________________.

15.若则＝_________________.

14.已知最小内角是_____________________.