a |
b |
3 |
1 |
2 |
a |
b |
a |
3 |
a |
b |
3 |
1 |
2 |
a |
b |
a |
3 |
3 |
2 |
3 |
3 |
2 |
1-cos2x |
2 |
| ||
2 |
3 |
2 |
π |
6 |
a |
b |
a |
π |
6 |
2π |
2 |
π |
2 |
π |
6 |
3π |
2 |
π |
3 |
5π |
6 |
π |
3 |
5π |
6 |
π |
6 |
π |
6 |
π |
2 |
π |
3 |
a |
sinA |
c |
sinC |
4×sin
| ||
4
|
4sin
| ||
2
|
π |
2 |
π |
6 |
1 |
2 |
1 |
2 |
3 |
3 |
π |
2 |
3 |
5 |
4 |
5 |
2 |
π |
4 |
π |
2 |
1 |
2 |
3 |
1 |
2 |
a |
b |
1 |
2 |
a |
a |
b |
7π |
12 |
π |
4 |
π |
4 |
3π |
4 |
A.①②④ | B.①③ | C.②③ | D.③④ |
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