A.135° | B.120° | C.105° | D.95° |
cos40°-sin10° |
sin40°-cos10° |
cos(30°+10°)-sin10° |
sin(30°+10°)-cos10° |
cos30°cos10°-sin30°sin10°-sin10° |
sin30°cos10°+cos30°sin10°-cos10° |
| ||||||
|
| ||
cos30°sin10°-sin30°cos10° |
| ||
sin(-20°) |
3 |
3 |
A.[0,
| B.[
| C.[
| D.[0,
|
1 |
5 |
A.
| B.-
| C.-
| D.-
|
5 |
3 |
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