3 |
3 |
| ||
2bccosA |
sinA |
cosA |
| ||
2cosA |
| ||
2 |
π |
2 |
π |
3 |
3 |
3 |
sin50° |
cos50° |
cos50°-
| ||
cos50° |
sin(30°-50°) |
cos50° |
2sin20°cos20° |
sin40° |
π |
2 |
3π |
2 |
AC |
BC |
AC |
BC |
2sin2α+2sinαcosα |
1+tanα |
OC |
OD |
π |
2 |
3π |
2 |
a |
b |
a |
b |
π |
2 |
π |
12 |
2 |
1 |
2 |
| ||
2 |
π |
6 |
π |
3 |
| ||
2 |
1 |
2 |
3 |
m |
n |
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