2-2cosx |
2-2cos(
|
2-2cosx |
2-2cos(
|
2(1-cosx) |
2[1-cos(x-
|
x |
2 |
x |
2 |
π |
3 |
|
|
x |
2 |
π |
3 |
π |
2 |
π |
3 |
x |
2 |
π |
3 |
x |
2 |
π |
6 |
π |
2 |
4π |
3 |
3 |
x |
2 |
π |
6 |
3 |
4π |
3 |
3 |
4π |
3 |
3 |
OP1 |
OP2 |
OP3 |
OP1 |
OP2 |
OP2 |
OP3 |
OP3 |
OP1 |
A.钝角三角形 | B.直角三角形 | C.等腰三角形 | D.等边三角形 |
m |
3 |
x |
4 |
n |
x |
4 |
x |
4 |
m |
n |
1+
| ||
2 |
3 |
3 |
s | 2 |
1 |
2 |
3 |
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