a |
b |
a |
b |
π |
2 |
3 |
4 |
a |
b |
1-cos2x |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
| ||
2 |
π |
4 |
1 |
2 |
π |
2 |
π |
4 |
π |
4 |
3π |
4 |
π |
4 |
π |
4 |
| ||
2 |
| ||
2 |
1 |
2 |
π |
2 |
π |
4 |
π |
2 |
π |
8 |
3π |
8 |
π |
2 |
π |
4 |
3π |
2 |
3π |
8 |
7π |
8 |
π |
2 |
3π |
8 |
3π |
8 |
π |
2 |
3 |
4 |
| ||
2 |
π |
4 |
1 |
2 |
3 |
4 |
π |
4 |
| ||
4 |
π |
2 |
π |
4 |
π |
4 |
3π |
4 |
π |
4 |
1 |
2 |
π |
4 |
π |
6 |
π |
4 |
| ||
4 |
π |
4 |
π |
4 |
| ||
2 |
π |
4 |
| ||
2 |
π |
4 |
| ||
2 |
| ||
4 |
| ||
4 |
| ||
4 |
AP |
1 |
2 |
AB |
1 |
2 |
AC |
1 |
6 |
BC |
A.△ABC的一边上 | B.△ABC的一顶点处 |
C.△ABC的外部 | D.△ABC的内部 |
AB |
AC |
AB |
A.7 | B.4 | C.3 | D.2 |
OA |
OB |
OC |
a |
A.±
| B.10或0 | C.±5 | D.13或3 |
a |
b |
1 |
2 |
c |
d |
a |
b |
c |
d |
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