|
|
|
|
|
|
|
|
|
|
度 |
弧度 |
||||||
|
0 |
|
0 |
1 |
0 |
|
1 |
|
|
15 |
|
|
|
|
|
|
|
|
18 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
度 |
弧度 |
||||||
|
22.5 |
|
|
|
|
|
|
|
|
30 |
|
|
|
|
|
|
2 |
|
36 |
|
|
|
|
|
|
|
|
45 |
|
|
|
1 |
1 |
|
|
|
54 |
|
|
|
|
|
|
|
|
60 |
|
|
|
|
|
2 |
|
|
67.5 |
|
|
|
|
|
|
|
|
72 |
|
|
|
|
|
|
|
|
75 |
|
|
|
|
|
|
|
|
90 |
|
1 |
0 |
|
0 |
|
1 |
|
120 |
|
|
|
|
|
|
|
|
135 |
|
|
|
|
|
|
|
|
150 |
|
|
|
|
|
|
2 |
|
180 |
|
0 |
|
0 |
|
|
|
，（即左、右极限）.一个锐角的余角的三角函数值等于这个角的余三角函数值，例如
，
，
.