B |
2 |
C |
2 |
b2+c2-a2 |
2bc |
1 |
2 |
1 |
2 |
π |
3 |
B |
2 |
C |
2 |
π |
3 |
2π |
3 |
2π |
3 |
2π |
3 |
2π |
3 |
| ||
2 |
1 |
2 |
π |
6 |
2π |
3 |
π |
6 |
π |
6 |
π |
6 |
π |
2 |
π |
3 |
π |
3 |
1 |
8 |
π |
4 |
π |
2 |
A.
| B.
| C.-
| D.±
|
1 |
4 |
A.
| B.
| C.-
| D.-
|
cos2α |
1+sin2α |
1+tanα |
1-tanα |
sin2α-2sinαcosα-cos2α |
4cos2α-3sin2α |
5 |
13 |
3 |
5 |
A.
| B.
| C.
| D.-
|
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