13 |
BC |
AB |
2 | ||
|
2 |
13 |
13 |
2 |
13 |
13 |
A.tan70°<cos70°<sin70° | B.cos70°<tan70°<sin70° |
C.sin70°<cos70°<tan70° | D.cos70°<sin70°<tan70° |
A.
| B.
| C.
| D.
|
3 |
4 |
A.0°<A<30° | B.30°<A<45° | C.45°<A<60° | D.60°<A<90° |
A.扩大2倍 | B.缩小2倍 | C.扩大4倍 | D.不变 |
A.
| B.
| C.
| D.
|
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