1-2sin(π+2)cos(π+2) |
A.sin2-cos2 | B.cos2-sin2 | C.±(sin2-cos2) | D.sin2+cos2 |
π |
2 |
1-2sin(π+2)cos(π+2) |
1-2sin2cos2 |
sin22+cos22-2sin2cos2 |
(sin2-cos2)2 |
1 |
3 |
1 |
2 |
A.-
| B.-
| C.
| D.
|
π |
4 |
π |
2 |
| ||
4 |
A.
| B.-
| C.
| D.-
|
A.
| B.0 | C.-
| D.
|
π |
2 |
1 |
3 |
π |
2 |
A.-2
| B.2
| C.-
| D.
|
π |
3 |
1 |
3 |
5π |
6 |
A.
| B.-
| C.
| D.-
|
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