3 |
1 |
2 |
m |
n |
3 |
1 |
2 |
| ||
2 |
1 |
2 |
π |
6 |
π |
6 |
kπ |
2 |
π |
12 |
kπ |
2 |
π |
12 |
π |
6 |
π |
2 |
π |
2 |
π |
6 |
π |
3 |
π |
6 |
π |
3 |
π |
6 |
π |
2 |
3π |
2 |
π |
3 |
5π |
6 |
π |
3 |
5π |
6 |
π |
6 |
π |
3 |
m |
n |
3 |
3 |
a |
b |
3 |
a |
b |
π |
2 |
5 |
2 |
π |
4 |
π |
2 |
π |
4 |
AB |
BC |
BC |
CA |
CA |
AB |
A..钝角三角形 | B.等边三角形 |
C.直角三角形 | D.非等腰锐角三角形 |
a |
b |
a |
b |
c |
a |
b |
c |
a |
b |
c |
1-x |
5π |
4 |
3π |
2 |
A.2sinθ | B.-2cosθ | C.-2sinθ | D.2cosθ |
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