3 |
a |
3 |
a |
A.(-
| B.(-
| C.(
| D.(
|
3 |
π |
3 |
3 |
π |
6 |
π |
2 |
π |
3 |
π |
2 |
a |
π |
2 |
A.A=10、ω=
| B.A=20、ω=
| ||||||||
C.A=30、ω=
| D.A=10、ω=
|
π |
6 |
π |
6 |
π |
6 |
A.2或0 | B.-2或2 | C.0 | D.-2或0 |
x |
3 |
π |
6 |
π |
4 |
A.y=2cos(
| B.y=2cos(
| ||||||||
C.y=2cos(
| D.y=2cos(
|
π |
3 |
A.关于点(
| B.关于直线x=
| ||||
C.关于点(
| D.关于直线x=
|
π |
4 |
π |
8 |
A.±1 | B.-3或1 | C.±3 | D.-1或3 |
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