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Foci of a Horizontal Ellipse
For:
$$\frac{x^2}{a^2}+\frac{y^2}{b^2}=1$$
the foci are:
$$S_1(-c,0),\quad S_2(c,0)$$
Usage
- Used in focal-distance and focus-directrix problems.
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Foci of a Horizontal Ellipse
For:
$$\frac{x^2}{a^2}+\frac{y^2}{b^2}=1$$
the foci are:
$$S_1(-c,0),\quad S_2(c,0)$$
Usage
- Used in focal-distance and focus-directrix problems.
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