π |
6 |
π |
6 |
π |
6 |
π |
6 |
(1)T=
2π |
2 |
(2)函數(shù)f(x)的單調(diào)増區(qū)間為2x+
π |
6 |
∴x∈[?
π |
12 |
5π |
12 |
即函數(shù)f(x)的單調(diào)増區(qū)間為x∈[?
π |
12 |
5π |
12 |
(3)當x∈[0,
2π |
3 |
π |
6 |
π |
6 |
3π |
2 |
∴當2x+
π |
6 |
5π |
12 |
π |
6 |
2π |
3 |
π |
6 |
π |
6 |
π |
6 |
π |
6 |
2π |
2 |
π |
6 |
π |
12 |
5π |
12 |
π |
12 |
5π |
12 |
2π |
3 |
π |
6 |
π |
6 |
3π |
2 |
π |
6 |
5π |
12 |