sin(α-3π)-2cos(
| ||
-sin(-α)+cos(π+α) |
sin(α-3π)-2cos(
| ||
-sin(-α)+cos(π+α) |
-sinα+2sinα |
sinα-cosα |
sinα |
sinα-cosα |
tanα |
tanα-1 |
3 |
3-1 |
3 |
2 |
2
| ||
3 |
2 |
B+C |
2 |
1-cosA |
2 |
1-sin4α-cos4α |
sin2α-sin4α |
A.
| B.2 | C.3 | D.1 |
cosx+sinx |
cosx-sinx |
π |
2 |
π |
2 |
A.
| B.-
| C.
| D.-
|
a |
3 |
2 |
b |
1 |
3 |
a |
b |
A.30° | B.60° | C.75° | D.45° |
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