3π |
2 |
1 |
2 |
π |
2 |
3π |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
5π |
6 |
A.-
| B.-
| C.-
| D.
|
sin(2π-α)sin(π+α)cos(-π-α) |
sin(3π-α)•cos(π-α) |
3 |
A.-1 | B.0 | C.1 | D.2 |
sin(2π-θ)•tan(π+θ)•cot(-θ-π) |
cos(π-θ)•tan(3π-θ) |
2 |
3 |
A.在[0,π]上是增函数,在[π,2π]上是减函数 | ||||||||
B.在[
| ||||||||
C.在[π,2π]上是增函数,在[0,π]上是减函数 | ||||||||
D.在[0,
|
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