| π |
| 3 |
| 3 |
| 1 |
| 2 |
=2sinx(cosxcos
| π |
| 3 |
| π |
| 3 |
| 3 |
| 1 |
| 2 |
=sinxcosx-
| 3 |
| 3 |
| 1 |
| 2 |
=sin2x+
| 3 |
=2sin(2x+
| π |
| 3 |
(1)因为T=
| 2π |
| 2 |
(2)由-1≤sin(2x+
| π |
| 3 |
则函数f(x)的最大值为2,最小值为-2;
(3)令2kπ-
| π |
| 2 |
| π |
| 3 |
| π |
| 2 |
解得:kπ-
| 5π |
| 12 |
| π |
| 12 |
则f(x)的单调递增区间为:[kπ-
| 5π |
| 12 |
| π |
| 12 |
| π |
| 3 |
| 3 |
| 1 |
| 2 |
| π |
| 3 |
| 3 |
| 1 |
| 2 |
| π |
| 3 |
| π |
| 3 |
| 3 |
| 1 |
| 2 |
| 3 |
| 3 |
| 1 |
| 2 |
| 3 |
| π |
| 3 |
| 2π |
| 2 |
| π |
| 3 |
| π |
| 2 |
| π |
| 3 |
| π |
| 2 |
| 5π |
| 12 |
| π |
| 12 |
| 5π |
| 12 |
| π |
| 12 |