3 |
A.
| B.
| C.
| D.
|
3 |
2 |
a |
c |
| ||
|
| ||
3 |
3 |
5 |
A.
| B.
| C.
| D.
|
A.cosA=cosA′ | B.cosA=3cosA′ |
C.3cosA=cosA′ | D.不能确定 |
1 |
2 |
(sinα-1)2 |
A.(1)(3)(4) | B.(2)(4) | C.(2)(3)(4) | D.(3)(4) |
A.cos43°>cos16°>sin30° | B.cos16°>sin30°>cos43° |
C.cos16°>cos43°>sin30° | D.cos43°>sin30°>cos16° |
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