a |
| ||
5 |
A+B |
2 |
A-B |
2 |
a |
3 |
5 |
5 |
a |
3 |
5 |
5 |
13 |
5 |
A+B |
2 |
A-B |
2 |
9 |
5 |
13 |
5 |
1-cos(A+B) |
2 |
1+cos(A-B) |
2 |
9 |
5 |
4 |
9 |
4 |
9 |
tanAtanB |
4 |
3 |
tanA+tanB |
1-tanAtanB |
9 |
5 |
9 |
5 |
tanAtanB |
12 |
5 |
12 |
5 |
AB |
AC |
| ||
|
|
| ||
|
|
BC |
| ||
|
|
| ||
|
|
1 |
2 |
A.三边均不相等的三角形 | B.直角三角形 |
C.等腰非等边三角形 | D.等边三角形 |
a |
b |
a |
b |
4
| ||
13 |
π |
2 |
π |
2 |
4 |
5 |
m |
n |
3 |
m |
n |
m |
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