AB |
a |
AC |
b |
a |
b |
15 |
4 |
a |
b |
a |
b |
A.30° | B.-150° | C.150° | D.30°或150° |
15 |
4 |
1 |
2 |
a |
b |
15 |
4 |
a |
b |
1 |
2 |
15 |
4 |
1 |
2 |
a |
b |
a |
b |
a |
b |
a |
b |
2 |
a |
a |
b |
1 |
2 |
a |
b |
a |
b |
1 |
2 |
a |
b |
a |
b |
a |
b |
a |
b |
3 |
a |
b |
1 |
2 |
π |
6 |
A |
2 |
3 |
a |
b |
a |
b |
b |
A.
| B.
| C.
| D.
|
a |
b |
b |
5 |
b |
A.(3,-6) | B.(-6,3) | C.(6,-3) | D.(-3,6) |
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