| π |
| 6 |
∴f(x)=
| ||
| 2 |
| 1 |
| 2 |
=(
| ||
| 2 |
| 1 |
| 2 |
=sin(2x−
| π |
| 6 |
∵T=
| 2π |
| 2 |
(2)当2x−
| π |
| 6 |
| π |
| 2 |
即x=kπ+
| 2π |
| 3 |
因此f(x)取最大值时x的集合是{x|x=kπ+
| 2π |
| 3 |
(3)f(x)=sin(2x−
| π |
| 6 |
再由2kπ−
| π |
| 2 |
| π |
| 6 |
| π |
| 2 |
解得kπ−
| π |
| 6 |
| π |
| 3 |
所以y=f(x)的单调增区间为[kπ−
| π |
| 6 |
| π |
| 3 |
| π |
| 6 |
| π |
| 6 |
| ||
| 2 |
| 1 |
| 2 |
| ||
| 2 |
| 1 |
| 2 |
| π |
| 6 |
| 2π |
| 2 |
| π |
| 6 |
| π |
| 2 |
| 2π |
| 3 |
| 2π |
| 3 |
| π |
| 6 |
| π |
| 2 |
| π |
| 6 |
| π |
| 2 |
| π |
| 6 |
| π |
| 3 |
| π |
| 6 |
| π |
| 3 |