a |
b |
13 |
a |
b |
b |
A.(-4,6) | B.(4,6) | C.(6,-4)或(-6,4) | D.(-4,-6)或(4,6) |
b |
b |
13 |
m2+n2 |
13 |
a |
b |
a |
|
b |
a |
1 |
2 |
b |
a |
b |
a |
b |
a |
a |
b |
c |
b |
c |
b |
OC |
OA |
OB |
A.2x-y+16=0 | B.2x-y-16=0 | C.x-y+10=0 | D.x-y-10=0 |
a |
b |
c |
c |
A.-
| B.
| C.
| D.-
|
a |
2 |
a |
b |
5π |
4 |
13π |
4 |
a |
b |
3 |
θ |
2 |
π |
8 |
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