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Pair of Parallel Tangents
For tangents parallel to:
$$lx+my=0$$
the pair of tangents to the ellipse is:
$$lx+my=\pm\sqrt{a^2l^2+b^2m^2}$$
Usage
- Used to find both tangents parallel to a given direction.
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Pair of Parallel Tangents
For tangents parallel to:
$$lx+my=0$$
the pair of tangents to the ellipse is:
$$lx+my=\pm\sqrt{a^2l^2+b^2m^2}$$
Usage
- Used to find both tangents parallel to a given direction.
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