π |
2 |
1+2sin2x |
sin2x |
|
A.(
| B.(
| C.[
| D.[
|
π |
2 |
3sin2x+cos2x |
2sinxcosx |
1 |
2 |
1 |
tanx |
3tanx•
|
3 |
| ||
3 |
π |
6 |
3 |
π |
4 |
π |
2 |
|
| ||
4 |
π |
4 |
| ||
4 |
π |
4 |
π |
4 |
π |
2 |
| ||
4 |
π |
2 |
x |
1-x |
A.-2<x<5 | B.-2<x<0 | C.-5<x<2 | D.-2<x<6 |
A.x2+4x+4>0 | B.|x|>0 | C.
| D.x2-x+1≥0 |
A.{x|
| B.{x|x<
| ||||
C.{x|-1<x<-
| D.{x|x<-1或x>
|
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