4sin 2α-3sinαcosα-5cos 2α |
sin2α+cos2α |
4tan2α-3tanα-5 |
tan2α+1 |
4×4-3×2-5 |
4+1 |
π |
2 |
3π |
2 |
AC |
BC |
1+tanα |
2sin2α+sin2α |
A.-
| B.-
| C.2 | D.3 |
sinα | ||
|
| ||
cosα |
A.2 | B.-2 | C.-2或2 | D.0 |
sinx | ||
|
| ||
cosx |
A.(2kπ,2kπ+
| B.(2kπ+
| ||||||
C.(2kπ-π,2kπ-
| D.(kπ-
|
3 |
5 |
4 |
3 |
sinθ+cosθ |
sinθ-cosθ |
A.
| B.-
| C.7 | D.-7 |
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