AC |
BC |
OA |
OB |
OC |
AC |
BC |
AC |
BC |
(2sinθ-1)2+cos2θ |
4sin2θ+(cosθ-1)2 |
1 |
2 |
OA |
OB |
OC |
OA |
OB |
OA |
OB |
OC |
1 |
2 |
1 |
4 |
3 |
4 |
A.sinα=
| ||||
B.sinα=0,且cosα=-1 | ||||
C.tanα=1,且cosα=-1 | ||||
D.α是第二象限角时,tanα=-
|
1-sin2160° |
A.-cos20° | B.cos20° | C.±cos20° | D.±|cos20°| |
1 |
8 |
A.-
| B.
| ||||||||
C.tan2A+cot2A=7 | D.
|
π |
2 |
| ||
2 |
m |
2 |
sinθ | ||
1-
|
cosθ |
1-tanθ |
π |
4 |
2π |
3 |
2 |
3 |
π |
12 |
12 |
5 |
© 2017-2019 超级试练试题库,All Rights Reserved.