m |
2 |
n |
m |
n |
2 |
m |
2 |
n |
m |
n |
2 |
2 |
2 |
b2+c2-a2 |
2bc |
1 |
2 |
π |
3 |
2π |
3 |
| ||
2 |
1 |
2 |
3 |
| ||
2 |
1 |
2 |
3 |
π |
6 |
2π |
3 |
π |
6 |
π |
6 |
5π |
6 |
π |
6 |
1 |
2 |
| ||
2 |
3 |
3 |
2 |
3 |
A.1 | B.2 | C.3 | D.0 |
A.a=1,b=
| B.a=1,b=2,c=3 | ||
C.b=c=1,B=45° | D.a=1,b=2,A=100° |
6 |
7 |
8 |
A.2 | B.4 | C.3 | D.5 |
A.150° | B.135° | C.120° | D.90° |
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