m |
n |
n |
m |
A.、重合 | B.相交(不垂直) | C.垂直 | D.平行 |
x2+(y-a)2 |
1 |
2 |
1 |
2 |
n |
m |
2 |
π |
4 |
2 |
π |
4 |
m |
n |
n |
m |
2 |
π |
2 |
2 |
m |
n |
n |
m |
2 |
2 |
2 |
a1 |
a2 |
sin2A |
sin2B |
sin2A |
sinAsinC |
sinA |
sinC |
b1 |
b2 |
sinA |
sinC |
c1 |
c2 |
-a |
-c |
-2RsinA |
-2RsinC |
sinA |
sinC |
a1 |
a2 |
b1 |
b2 |
c1 |
c2 |
2 |
a2+b2 |
(a-5)2+(b+1)2 |
A.直线y-1=0上 | B.直线y=x上 |
C.直线x+1=0上 | D.直线y+3=0上 |
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