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Directrices of a Horizontal Ellipse
For:
$$\frac{x^2}{a^2}+\frac{y^2}{b^2}=1$$
the directrices are:
$$x=\pm\frac{a}{e}$$
Usage
- Used in focus-directrix and eccentricity problems.
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Directrices of a Horizontal Ellipse
For:
$$\frac{x^2}{a^2}+\frac{y^2}{b^2}=1$$
the directrices are:
$$x=\pm\frac{a}{e}$$
Usage
- Used in focus-directrix and eccentricity problems.
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