sin2x |
cos2x-sin2y |
sin(x+y) |
cos(x+y) |
sin(x-y) |
cos(x-y) |
sin[(x+y)+(x-y)] |
cos2x•cos2y-sin2x•sin2y |
sin2x |
cos2x-(cos2x+sin2x)sin2y |
sin2x |
cos2x-sin2y |
3x |
2 |
x |
2 |
2sinx |
cosx+cos2x |
1 |
7 |
11 |
14 |
π |
2 |
π |
8 |
π |
8 |
1+tan75° |
1-tan75° |
A.0 | B.
| C.
| D.-
|
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