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)因為T=
2π |
2 |
(2)由-1≤sin(2x+
π |
3 |
則函數(shù)f(x)的最大值為2,最小值為-2;
(3)令2kπ-
π |
2 |
π |
3 |
π |
2 |
解得:kπ-
5π |
12 |
π |
12 |
則f(x)的單調(diào)遞增區(qū)間為:[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 |