π |
6 |
a |
sinA |
b |
sinB |
c |
sinC |
a |
b |
sinA |
sinB |
c |
b |
sinC |
sinB |
sinA |
sinB |
sinC |
sinB |
1 |
2 |
π |
3 |
a2+c2-b2 |
2ac |
a2+b2-c2 |
2ab |
a2+c2-b2 |
2ac |
1 |
2 |
π |
3 |
CD |
sin∠CAD |
AD |
sinC |
BD |
sin∠BAD |
AD |
sinB |
π |
3 |
π |
6 |
π |
3 |
π |
6 |
π |
2 |
1 | ||
sin
|
AD |
sinC |
1 | ||
sin(
|
AD | ||
sin
|
| ||
2 |
π |
2 |
π |
3 |
2π |
3 |
π |
3 |
π |
6 |
π |
3 |
π |
6 |
π |
2 |
π |
6 |
π |
3 |
A.
| B.
| C.
| D.2
|
32 |
17 |
3 |
A.
| B.3 | C.4 | D.
|
A.a=1,b=2,c=3 | B.a=1,b=
| ||
C.a=1,b=2,∠A=100° | D.b=c=1,∠B=45° |
3 |
2 |
A.B=45°或135° | B.B=135° |
C.B=45° | D.以上答案都不对 |
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