sin225°+tan330° |
cos(-120°) |
2 |
sin2x |
-sin45°+tg(-30°) |
-cos60° |
3
| ||||
3 |
sinx |
cosx |
cosx |
sinx |
2 |
sin2x |
AB•sinA |
sinC |
6 |
4π |
3 |
25π |
6 |
3π |
4 |
A.sinθ<0,cosθ>0 | B.sinθ>0,cosθ<0 |
C.sinθ>0,cosθ>0 | D.sinθ<0,cosθ<0 |
A.1+
| B.1-
| C.-1-
| D.-1+
|
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