a |
b |
a |
b |
a |
b |
a |
b |
sin2θ+cos2θ |
a |
b |
a |
b |
| ||||
|
|
1 |
2 |
2sinθ |
2 |
a |
b |
a |
b |
|
22+4×1+4×1 |
3 |
3 |
OA |
OB |
OC |
AB |
AC |
A.
| B.
| ||||
C.0 | D.以上结果都不对 |
AB |
a |
AC |
b |
a |
b |
15 |
4 |
a |
b |
a |
b |
A.30° | B.-150° | C.150° | D.30°或150° |
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 |
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