cos15°+sin15° |
cos15°-sin15° |
cos15°+sin15° |
cos15°-sin15° |
(sin15°+cos15°)2 |
(cos15°-sin15°)(cos15°+sin15°) |
1+2sin15°cos15° |
cos215°-sin215° |
1+sin30° |
cos30° |
1+
| ||||
|
3 |
3 |
12 |
5 |
sinα-4cosα |
5sinα+2cosα |
2cosθ |
cosθ-sinθ |
A.-2 | B.2 | C.0 | D.
|
π |
4 |
π |
4 |
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