11 |
14 |
11 |
14 |
1-cos2(B+C) |
1-(-
|
5
| ||
14 |
11 |
14 |
1 |
2 |
5
| ||
14 |
| ||
2 |
1 |
7 |
1 |
7 |
5
| ||
14 |
1-cos2C |
1-(
|
4
| ||
7 |
5
| ||
14 |
a |
sinA |
c |
sinC |
5 | ||||
|
c | ||||
|
| ||
2 |
1 |
2 |
1 |
2 |
| ||
2 |
3 |
a |
b |
π |
3 |
π |
3 |
a |
b |
α |
2 |
| ||
5 |
α |
2 |
| ||
10 |
π |
2 |
A.
| B.
| C.
| D.
|
1 |
tanα |
7 |
2 |
cos(π-α)+sin(
| ||||
tan(π+α)-
|
π |
4 |
1 |
7 |
A.B=C | B.B>C |
C.B<C | D.B、C的大小与A的值有关 |
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