1 |
3 |
1 |
2 |
A.-
| B.-
| C.
| D.
|
1 |
3 |
1 |
2 |
cos2θ+cosθ•sinθ |
sin2θ+cos2θ |
1+tanθ |
1+tan2θ |
6 |
5 |
1-sin100° |
A.cos50° | B.cos50°-sin50° |
C.sin50°-cos50° | D.±(cos50°-sin50°) |
1+sin8 |
A.sin4+cos4 | B.-sin4-cos4 | C.sin4 | D.cos4 |
π |
4 |
3 |
5 |
A.-
| B.
| C.-
| D.
|
4 |
5 |
3 |
5 |
3π |
2 |
A.1 | B.-1 | C.-
| D.-1或-
|
A.
| B.0 | C.-
| D.
|
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