3 |
π |
2 |
3 |
1 |
2 |
3 |
1-cos2x |
2 |
1 |
2 |
| ||
2 |
| ||
2 |
π |
3 |
| ||
2 |
2π |
2 |
π |
2 |
π |
3 |
3π |
2 |
π |
12 |
7π |
12 |
π |
12 |
7π |
12 |
π |
2 |
π |
3 |
π |
3 |
4π |
3 |
| ||
2 |
π |
3 |
π |
3 |
4π |
3 |
π |
2 |
3 |
π |
2 |
3 |
π |
2 |
A.等腰直角三角形 | B.等腰三角形 |
C.直角三角形 | D.等边三角形 |
A.
| B.
| C.
| D.
|
3 |
| ||
2 |
π |
4 |
π |
8 |
π |
2 |
| ||
2 |
A.锐角三角形 |
B.直角三角形 |
C.钝角三角形 |
D.锐角三角形或钝角三角形 |
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