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Product of Focal Distances
For:
$$P(a\cos\theta,b\sin\theta)$$
$$PS_1\cdot PS_2=a^2-c^2\cos^2\theta$$
Usage
- Used when a problem involves the product of the two focal distances.
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Product of Focal Distances
For:
$$P(a\cos\theta,b\sin\theta)$$
$$PS_1\cdot PS_2=a^2-c^2\cos^2\theta$$
Usage
- Used when a problem involves the product of the two focal distances.
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