CA |
CB |
AB |
3 |
5 |
AB |
tanA |
tanB |
A.2 | B.4 | C.
| D.2
|
CA |
CB |
AB |
3 |
5 |
AB |
CA |
AB |
CB |
AB |
3 |
5 |
AB |
3 |
5 |
3 |
5 |
a2+c 2-b2 |
2ac |
b2+c 2-a2 |
2bc |
3 |
5 |
3 |
5 |
tanA |
tanB |
sinA•cosB |
sinBcosA |
a•
| ||
b•
|
a2-b2+c2 |
b2-a2+c2 |
| ||
-
|
13 |
A.90° | B.60° | C.120° | D.150° |
A.1<c<5 | B.1<c<
| C.
| D.1<c<
|
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