x |
2 |
π |
6 |
x |
2 |
π |
6 |
2 |
x |
2 |
π |
12 |
∴由2kπ-π≤
x |
2 |
π |
12 |
x |
2 |
π |
6 |
x |
2 |
π |
6 |
由2kπ-π≤
x |
2 |
π |
12 |
∴2kπ-
13π |
12 |
x |
2 |
π |
12 |
∴4kπ-
13π |
6 |
π |
6 |
故選A.
x |
2 |
π |
6 |
x |
2 |
π |
6 |
13π |
6 |
π |
6 |
π |
6 |
11π |
6 |
π |
6 |
11π |
6 |
x |
2 |
π |
6 |
x |
2 |
π |
6 |
2 |
x |
2 |
π |
12 |
x |
2 |
π |
12 |
x |
2 |
π |
6 |
x |
2 |
π |
6 |
x |
2 |
π |
12 |
13π |
12 |
x |
2 |
π |
12 |
13π |
6 |
π |
6 |