x |
2 |
1 |
2x |
A.2kπ,k∈Z | B.(2k+1)π,k∈Z | C.kπ,k∈Z | D.kπ+
|
x |
2 |
1 |
2x |
π |
4 |
π |
4 |
A.α+β=0 | B.α-β=
| C.α+β=2kπ | D.α-β=2kπ-
|
kπ |
2 |
π |
2 |
1 |
2 |
kπ |
2 |
π |
3 |
π |
6 |
sin(π-α)+cos(-α) |
tan(π+α) |
1 |
2 |
π |
3 |
A.第二象限的角是钝角 |
B.第三象限的角必大于第二象限的角 |
C.-831°是第二象限角 |
D.-95°20′,984°40′,264°40′是终边相同的角 |
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