sin80° |
cos50° |
3 |
3 |
3 |
sin10° |
cos10° |
cos10°+
| ||
cos10° |
2sin(10°+30°) |
cos10° |
2sin40° |
cos10° |
sin80° |
cos50° |
2sin40° |
cos10° |
cos10° |
sin40° |
2sin40° |
cos10° |
1 |
tanθ |
A.
| B.
| C.
| D.
|
1 |
2 |
3
| ||
10 |
A.
| B.
| C.
| D.
|
A.3π | B.2π | C.π | D.
|
2 |
3 |
A.锐角三角形 | B.直角三角形 | C.钝角三角形 | D.不确定 |
π |
2 |
π |
2 |
1 |
2 |
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