| 3 |
| ||
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
| π |
| 6 |
| 1 |
| 2 |
∵ω>0,∴T=
| 2π |
| 2ω |
∴ω=1.
(2)由(1)可知f(x)=-sin(2x-
| π |
| 6 |
| 1 |
| 2 |
∵2kπ-
| π |
| 2 |
| π |
| 6 |
| π |
| 2 |
得kπ-
| π |
| 3 |
| 2π |
| 3 |
由2kπ+
| π |
| 2 |
| π |
| 6 |
| 3π |
| 2 |
得kπ+
| 2π |
| 3 |
| 5π |
| 3 |
所以函数的单调减区间为[kπ-
| π |
| 3 |
| 2π |
| 3 |
函数的单调增区间为[kπ+
| 2π |
| 3 |
| 5π |
| 3 |
| a |
| 3 |
| b |
| a |
| b |
| 3 |
| ||
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
| π |
| 6 |
| 1 |
| 2 |
| 2π |
| 2ω |
| π |
| 6 |
| 1 |
| 2 |
| π |
| 2 |
| π |
| 6 |
| π |
| 2 |
| π |
| 3 |
| 2π |
| 3 |
| π |
| 2 |
| π |
| 6 |
| 3π |
| 2 |
| 2π |
| 3 |
| 5π |
| 3 |
| π |
| 3 |
| 2π |
| 3 |
| 2π |
| 3 |
| 5π |
| 3 |