tan2a-1 |
tanα |
2(1-tan2α) |
2tanα |
1 |
tanα |
2 |
tan2α |
1 |
tan2α |
2 |
tan4α |
1 |
tan4α |
2 |
tan8α |
π |
32 |
π |
16 |
π |
8 |
1 | ||
tan
|
A.-2 | B.-4 | C.-6 | D.-8 |
π |
32 |
1 | ||
tan
|
2 | ||
tan
|
π |
16 |
2 | ||
tan
|
π |
8 |
-4 | ||
tan
|
π |
8 |
2 | ||
tan
|
1 |
3 |
1 |
2 |
A.-
| B.-
| C.
| D.
|
1-sin100° |
A.cos50° | B.cos50°-sin50° |
C.sin50°-cos50° | D.±(cos50°-sin50°) |
1+sin8 |
A.sin4+cos4 | B.-sin4-cos4 | C.sin4 | D.cos4 |
π |
4 |
3 |
5 |
A.-
| B.
| C.-
| D.
|
4 |
5 |
3 |
5 |
3π |
2 |
A.1 | B.-1 | C.-
| D.-1或-
|
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