A.f(x)=sinx+cosx | B.f(x)=|tan
| ||
C.f(x)=|sin2x| | D.f(x)=sin(x+
|
2 |
π |
4 |
x |
2 |
x |
2 |
π |
2 |
π |
3 |
1 |
2 |
| ||
2 |
1 |
2 |
| ||
2 |
cos2x+1 |
2 |
1 |
4 |
| ||
4 |
| ||
4 |
1 |
2 |
π |
3 |
π |
4 |
2π |
2 |
α |
2 |
α |
2 |
α |
2 |
A.小于0 | B.大于0 | C.等于0 | D.无法确定 |
| ||
2 |
A.
| B.
| C.
| D.
|
π |
2 |
A.y=tanx | B.y=cosx | C.y=tan
| D.y=|sinx| |
2 |
3 |
π |
2 |
2 |
3 |
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