|
y |
x-3 |
A.[-
| B.[-
| C.[0,
| D.[-
|
y |
x-3 |
sinθ |
cosθ-2 |
sinθ |
cosθ-2 |
cosθ(cosθ-2)-sinθ×(-sinθ) |
(cosθ-2)2 |
1-2cosθ |
(cosθ-2)2 |
π |
3 |
π |
3 |
π |
3 |
π |
3 |
π |
3 |
sin
| ||
cos
|
| ||
3 |
sin0 |
cos0-2 |
sinπ |
cosπ-2 |
y |
x-3 |
| ||
3 |
π |
4 |
A.-1 | B.1 | C.±1 | D.不存在 |
3 |
A.30° | B.45° | C.60° | D.90° |
3 |
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