π |
6 |
x |
2 |
3 |
π |
6 |
x |
2 |
| ||
2 |
1 |
2 |
| ||
2 |
1 |
2 |
π |
6 |
π |
6 |
π |
6 |
5π |
6 |
π |
6 |
1 |
2 |
1 |
2 |
π |
6 |
π |
6 |
b |
sinB |
c |
sinC |
| ||
2 |
π |
3 |
2π |
3 |
π |
3 |
π |
2 |
b2+c2 |
2π |
3 |
π |
6 |
π |
6 |
A.等腰三角形 | B.直角三角形 |
C.等腰直角三角形 | D.锐角三角形 |
3 |
A.(
| B.(
| C.(
| D.(
|
A.等边三角形 | B.锐角三角形 | C.钝角三角形 | D.直角三角形 |
π |
3 |
1 |
2 |
| ||
2 |
3 |
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