a |
b |
a |
b |
a |
b |
3 |
a |
b |
a |
b |
A.
| B.
| C.
| D.
|
a |
b |
3 |
a |
b |
a |
a |
b |
b |
a |
a |
b |
b |
a |
b |
a |
b |
a |
b |
a |
b |
k2+1 |
4k |
k2+1 |
k |
2k |
k |
a |
b |
1 |
2 |
a |
b |
π |
3 |
a |
b |
π |
3 |
a |
b |
AB |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
a |
b |
A.30° | B.60° | C.120° | D.150° |
a |
b |
a |
b |
a |
b |
a |
b |
A.
| B.-
| C.
| D.-
|
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