α |
2 |
3 |
5 |
α |
2 |
4 |
5 |
A.第一象限 | B.第三或第四象限 |
C.第三象限 | D.第四象限 |
α |
2 |
α |
2 |
24 |
25 |
α |
2 |
α |
2 |
7 |
25 |
| ||
2 |
1 |
2 |
π |
6 |
5π |
6 |
π |
3 |
| ||
2 |
π |
2 |
A.y=sin
| B.y=sinx | C.y=-tanx | D.y=-cos2x |
π |
6 |
π |
6 |
π |
4 |
π |
3 |
π |
6 |
π |
3 |
A.y=sin(
| B.y=cos(2x+
| C.y=sin(2x-
| D.y=cos(2x-
|
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