Let d be the perpendicular distance from the centre of the ellipse to any tangent to the ellipe. If $F_{1} and F_{2}$ are the two foci of the ellipse, then shown that $(P F_{1} - P F_{2})^{2} = 4 a^{2}$ (1- $\frac{b ^{2}}{d ^{2}})$

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Let d be the perpendicular distance from the centre of the ellipse to any tangent to the ellipe. If

F_{1} and F_{2}

are the two foci of the ellipse, then shown that

(P F_{1} - P F_{2})^{2} = 4 a^{2}

(1-

\frac{b ^{2}}{d ^{2}})

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Question Text

Let d be the perpendicular distance from the centre of the ellipse to any tangent to the ellipe. If

F_{1} and F_{2}

are the two foci of the ellipse, then shown that

(P F_{1} - P F_{2})^{2} = 4 a^{2}

(1-

\frac{b ^{2}}{d ^{2}})

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