Focal Distance at the Major-Axis Vertex
At:
$$A(a,0)$$
the distances from the two foci are:
$$AS_1=a-c$$
$$AS_2=a+c$$
Usage
- Used in direct focal-distance calculations at the vertices.
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Focal Distance at the Major-Axis Vertex
Focal Distance at the Major-Axis Vertex
At:
$$A(a,0)$$
the distances from the two foci are:
$$AS_1=a-c$$
$$AS_2=a+c$$
Usage
- Used in direct focal-distance calculations at the vertices.
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