3 |
π |
2 |
3 |
1 |
2 |
3 |
1-cos2x |
2 |
1 |
2 |
| ||
2 |
| ||
2 |
π |
3 |
| ||
2 |
π |
3 |
| ||
2 |
π |
2 |
π |
3 |
π |
3 |
4π |
3 |
π |
3 |
π |
2 |
π |
12 |
| ||
2 |
π |
3 |
4π |
3 |
π |
2 |
3 |
π |
6 |
π |
2 |
6cos4x-sin2x-1 | ||
f(x+
|
1 |
2 |
π |
3, |
π |
3 |
A.±
| B.±
| C.±
| D.±
|
2 |
2 |
2A |
2 |
b+c |
2c |
A.正三角形 |
B.直角三角形 |
C.等腰三角形或直角三角形 |
D.等腰直角三角形 |
a |
3 |
4 |
b |
1 |
3 |
1 |
2 |
a |
b |
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