6 |
5 |
AB |
AC |
π |
6 |
6 |
5 |
6 |
5 |
b2+c2-a2 |
2bc |
3 |
5 |
1-cos2A |
4 |
5 |
AB |
AC |
AB |
AC |
3 |
5 |
1 |
2 |
1 |
2 |
4 |
5 |
b2+c2-2bccosA |
25+1-2×3 |
5 |
a2+c2-b2 |
2ac |
| ||
5 |
2
| ||
5 |
π |
6 |
| ||
2 |
1 |
2 |
| ||
2 |
| ||
5 |
1 |
2 |
2
| ||
5 |
| ||||
10 |
15
| ||
4 |
A.7 | B.3
| C.5 | D.3 |
π |
4 |
π |
4 |
π |
4 |
π |
2 |
2 |
. |
| . |
π |
3 |
bsinB |
c |
3 |
3 |
A.4 | B.
| C.2
| D.3
|
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