a |
b |
c |
a |
c |
b |
c |
π |
6 |
α-β |
2 |
a |
α |
2 |
α |
2 |
α |
2 |
b |
β |
2 |
β |
2 |
β |
2 |
α |
2 |
π |
2 |
π |
2 |
β |
2 |
a |
α |
2 |
b |
β |
2 |
| ||||
|
|
2cos2
| ||
2cos
|
α |
2 |
| ||||
|
|
β |
2 |
β |
2 |
π |
2 |
α |
2 |
β |
2 |
π |
2 |
π |
2 |
α |
2 |
β |
2 |
π |
2 |
π |
6 |
π |
2 |
α-β |
2 |
α-β |
2 |
π |
3 |
α-β |
2 |
1 |
2 |
a |
b |
3 |
a |
b |
3 |
a |
b |
OC |
AB |
AC |
BC |
OA |
OC |
13 |
OB |
OC |
2 |
a |
a |
b |
a |
b |
b |
a |
AB |
AC |
AB |
AC |
AB |
AC |
AB |
BC |
3 |
DB |
DM |
a |
b |
a |
b |
a |
b |
a |
b |
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