a |
3θ |
2 |
3θ |
2 |
b |
θ |
2 |
θ |
2 |
π |
3 |
| ||||
|
|
a |
b |
3 |
a |
b |
a |
b |
3θ |
2 |
3θ |
2 |
θ |
2 |
θ |
2 |
3θ |
2 |
θ |
2 |
3θ |
2 |
θ |
2 |
a |
b |
(
|
a•b |
|a+b| |
cos2θ |
2cosθ |
2cos2θ-1 |
2cosθ |
1 |
2cosθ |
π |
3 |
1 |
2 |
1 |
2 |
π |
3 |
a•b |
|a+b| |
1 |
2 |
a•b |
|a+b| |
1 |
2 |
3 |
k2+1 |
4k |
π |
3 |
1 |
2 |
1 |
2 |
k2+1 |
4k |
|
3 |
3 |
3 |
3 |
π |
2 |
AP |
|
CM |
CN |
1 |
2 |
7 |
3 |
MA |
MB |
a |
b |
c |
a |
b |
a |
c |
c |
a |
b |
AB |
AC |
a |
b |
a |
b |
b |
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