cot70°tan(-50°)-1 |
tan20°-tan50° |
cot70°tan(-50°)-1 |
tan20°-tan50° |
tan20°tan(-50°)-1 |
tan20°-tan50° |
tan20°tan50°+1 |
tan50°-tan20° |
1 |
tan30° |
3 |
3 |
m |
n |
m |
n |
3 |
3 |
3 |
π |
3 |
3 |
3 |
5 |
a |
2 |
1 |
2 |
π |
3 |
| ||
4 |
π |
3 |
A.
| B.-
| C.-
| D.0或-
|
1 |
2 |
1 |
2 |
π |
2 |
π |
6 |
1 |
2 |
1 |
2 |
π |
4 |
| ||
2 |
© 2017-2019 超级试练试题库,All Rights Reserved.