2cos10°-sin20° |
4sin70° |
2cos10°-sin20° |
4sin70° |
2cos10°-sin(30°-10°) |
4sin70° |
2cos10°-
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4sin70° |
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4sin70° |
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4sin70° |
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4sin70° |
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4 |
| ||
4 |
π |
4 |
A.x>y | B.x<y | C.x≥y | D.x≤y |
π |
4 |
1 |
3 |
π |
2 |
A.
| B.
| C.
| D.
|
1 |
3 |
sin(π-2α)+4cos2α |
10cos2α-sin2α |
a |
b |
a |
b |
π |
4 |
A.3 | B.-3 | C.
| D.-
|
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