x2 |
a2 |
y2 |
b2 |
| ||
2 |
cos(α-β) |
cos(α+β) |
y |
x+a |
y |
x-a |
y |
x+a |
y |
x-a |
y2 |
x2-a2 |
x2 |
a2 |
y2 |
b2 |
| ||
2 |
a2-b2 |
a2 |
3 |
4 |
x2 |
4b2 |
y2 |
b2 |
x2 |
4 |
a2-x2 |
4 |
y2 |
x2-a2 |
1 |
4 |
1 |
4 |
cos(α-β) |
cos(α+β) |
cosαcosβ+sinαsinβ |
cosαcosβ-sinαsinβ |
1+tanαtanβ |
1-tanαtanβ |
1-
| ||
1+
|
3 |
5 |
3 |
5 |
x2 |
a2 |
y2 |
b2 |
1 |
3 |
1 |
2 |
x2 |
36 |
y2 |
9 |
A.4 | B.
| C.-1 | D.-
|
x2 |
a2 |
y2 |
b2 |
π |
4 |
x2 |
a2 |
y2 |
b2 |
3 |
| ||
3 |
MF1 |
MF2 |
2 |
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