3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
sin70°cos10° |
cos70° |
| ||
cos20° |
sin70°cos10° |
cos70° |
2sin(20°-30°) |
cos20° |
-2sin10°cos10°sin70° |
sin20°cos20° |
-sin20°sin70° |
sin20°cos20° |
A.(
| B.(-
| C.(1,
| D.[-
|
A.
| B.-
| C.
| D.
|
4 |
5 |
1+tan
| ||
1-tan
|
π |
2 |
1 |
3 |
π |
2 |
x |
4 |
x |
4 |
x |
4 |
1 |
2 |
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