sin(2π-θ)•tan(π+θ)•cot(-θ-π) |
cos(π-θ)•tan(3π-θ) |
1 |
2 |
1 |
2 |
3 |
3 |
3 |
sin(2π-θ)•tan(π+θ)•cot(-θ-π) |
cos(π-θ)•tan(3π-θ) |
sinθ•tanθ•cot(-θ) |
-cosθ•tan(-θ) |
-sinθ•tanθ•cotθ |
cosθ•tanθ |
-sinθ | ||
cosθ•
|
-sinθ |
sinθ |
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,
|
π |
4 |
| ||
5 |
π |
4 |
3π |
4 |
π |
4 |
4sin(α-π)-sin(
| ||
3cos(α-
|
sin2α-2sinαcosα-cos2α |
4cos2α-3sin2α |
π |
2 |
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