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Tangent at a Point
For a point $$P(x_1,y_1)$$ on:
$$\frac{x^2}{a^2}+\frac{y^2}{b^2}=1$$
the tangent is:
$$\frac{xx_1}{a^2}+\frac{yy_1}{b^2}=1$$
Usage
- Used when the point of contact is given in Cartesian coordinates.
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Tangent at a Point
For a point $$P(x_1,y_1)$$ on:
$$\frac{x^2}{a^2}+\frac{y^2}{b^2}=1$$
the tangent is:
$$\frac{xx_1}{a^2}+\frac{yy_1}{b^2}=1$$
Usage
- Used when the point of contact is given in Cartesian coordinates.
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