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Pair of Tangents to a Rectangular Hyperbola
For:
$$xy=c^2$$
from a point $$P(x_1,y_1)$$, the combined equation of the pair of tangents is:
$$xy-x_1y-y_1x+2c^2=0$$
Usage
- Used to obtain both tangents from a point to a rectangular hyperbola.
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Pair of Tangents to a Rectangular Hyperbola
For:
$$xy=c^2$$
from a point $$P(x_1,y_1)$$, the combined equation of the pair of tangents is:
$$xy-x_1y-y_1x+2c^2=0$$
Usage
- Used to obtain both tangents from a point to a rectangular hyperbola.
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