4 |
5 |
12 |
13 |
3 |
OA |
OC |
4 |
5 |
12 |
13 |
3 |
5 |
4 |
5 |
12 |
13 |
3 |
5 |
5 |
13 |
5 |
13 |
3 |
5 |
12 |
13 |
4 |
5 |
33 |
65 |
OA |
OC |
3 |
OA |
OC |
3 |
π |
6 |
π |
2 |
π |
6 |
π |
6 |
π |
3 |
OA |
OC |
3 |
11 |
14 |
1 |
7 |
| ||
3 |
1-sin2
|
α |
3 |
α |
3 |
A.第一象限角 |
B.第一或第四象限角 |
C.第二或第三象限角 |
D.第一、第二或第三象限角 |
3 |
5 |
π |
2 |
π |
6 |
A.
| B.
| C.
| D.
|
12 |
13 |
A.
| B.-
| C.
| D.-
|
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