1-sin2x | ||
1-cos2(
|
1-sin2x | ||
1-cos2(
|
(sinx-cosx)2 |
1-sin2x |
sin2x-2sinxcosx+cos2x |
cos 2x |
π |
2 |
1 |
2 |
tanx•cotx |
1 |
2 |
π |
6 |
3 |
1 |
2 |
π |
4 |
|sinα-sinβ| |
|sinβ-sinγ| |
|sinγ-sinα| |
α |
2 |
α |
2 |
3 |
α |
2 |
3 |
m |
n |
m |
n |
1 |
2 |
A.
| B.
| C.
| D.
|
cosA |
cosB |
b |
a |
2π |
3 |
π |
6 |
π |
3 |
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