3 |
3 |
3 |
π |
3 |
π |
3 |
π |
3 |
π |
3 |
π |
6 |
π |
6 |
π |
3 |
π |
3 |
π |
3 |
π |
3 |
π |
3 |
| ||
2 |
a |
sinA |
b |
sinB |
c |
sinC |
asinB |
sinA |
2 | ||
|
2 | ||
|
π |
3 |
2π |
3 |
2π |
3 |
2 | ||
|
2 | ||
|
2π |
3 |
2 | ||
|
| ||
2 |
1 |
2 |
| ||
2 |
1 |
2 |
π |
6 |
π |
3 |
2π |
3 |
π |
6 |
π |
6 |
5π |
6 |
π |
6 |
1 |
2 |
BA |
BC |
A.等腰三角形 |
B.直角三角形 |
C.等腰直角三角形 |
D.等腰三角形或直角三角形 |
3 |
2cos2
| ||||
|
A.x=
| B.x=0 | C.x=-
| D.x=-
|
AB |
AC |
AB |
AC |
BC |
A.等边三角形 | B.等腰三角形 |
C.直角三角形 | D.等腰直角三角形 |
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