t |
2 |
A.[0,5] | B.[5,10] | C.[10,15] | D.[15,20] |
π |
2 |
t |
2 |
π |
2 |
t |
2 |
π |
4 |
A.[0,
| B.[
| C.[
| D.[-π,0] |
π |
4 |
1 |
2 |
A.{x|2kπ+
| ||||
B.{x|2kπ-
| ||||
C.{x|2kπ+
| ||||
D.{x|2kπ≤x≤2kπ+
|
m |
n |
m |
n |
π |
6 |
π |
3 |
π |
2 |
π |
3 |
π |
3 |
A.[-
| B.[-3,0) | C.(0,
| D.(0,3] |
3π |
4 |
5π |
8 |
9π |
8 |
5π |
8 |
9π |
8 |
A.2 | B.
| ||||||
C.2或
| D.
|
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