Condition for Perpendicular Tangents

Rarely Tested

Condition for Perpendicular Tangents

The intersection point $$P(x_1,y_1)$$ of two perpendicular tangents satisfies:

$$x_1^2+y_1^2=a^2-b^2$$

Usage

- Used to determine the locus of points from which perpendicular tangents can be drawn.

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