A.5 | B.10 | C.5
| D.5
|
a |
sinA |
c |
sinC |
csinA |
sinC |
5×
| ||||
|
3 |
6 |
A.1:
| B.1:2:4 | C.2:3:4 | D.1:
|
A.a=7,b=14,A=30°,有两解 |
B.a=30,b=25,A=150°,有一解 |
C.a=6,b=9,A=45°,有两解 |
D.a=9,b=10,A=60°,无解 |
A.(2,+∞) | B.(0,2) | C.(2,2
| D.(
|
A.30° | B.60° | C.90° | D.120° |
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