a |
b |
c |
π |
2 |
π |
2 |
a |
c |
b |
a |
b |
a |
c |
a |
c |
b |
1 |
2 |
π |
2 |
π |
2 |
π |
6 |
5π |
6 |
π |
12 |
5π |
12 |
a |
b |
a |
b |
(sinθ+1)2+(cosθ+1)2 |
3+2(sinθ+cosθ) |
3+2
|
π |
2 |
π |
2 |
π |
4 |
π |
4 |
3π |
4 |
| ||
2 |
π |
4 |
2 |
π |
4 |
2 |
3+2
|
2 |
a |
b |
2 |
a |
|
b |
|
A.(
| B.(
| C.
| D.|
|
CA |
CB |
AB |
AB |
A.△ABC是锐角三角形 | B.△ABC是直角三角形 |
C.△ABC是钝角三角形 | D.△ABC的形状不能确定 |
a |
b |
a |
b |
a |
b |
a |
b |
A.
| ||||||||||||
B.λ(
| ||||||||||||
C.(
| ||||||||||||
D.若
|
a |
b |
c |
A.|
| B.|(
| ||||||||||||||||||||||||
C.|(
| D.|(
|
3 |
AE |
AB |
AE |
AC |
A.3 | B.2 | C.
| D.
|
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