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Chord of Contact for a Circle at Origin
For:
$$x^2+y^2=a^2$$
the chord of contact from $$(x_1,y_1)$$ is:
$$xx_1+yy_1=a^2$$
Usage
- Used to obtain the polar of an external point with respect to a circle centred at the origin.
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Chord of Contact for a Circle at Origin
For:
$$x^2+y^2=a^2$$
the chord of contact from $$(x_1,y_1)$$ is:
$$xx_1+yy_1=a^2$$
Usage
- Used to obtain the polar of an external point with respect to a circle centred at the origin.
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