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Prove that the product of the lengths of...

Prove that the product of the lengths of the perpendiculars drawn from the points `(sqrt(a^(2)-b^(2)), 0)` and `(-sqrt(a^(2)-b^(2)), 0)` to the line `(x)/(a)cos theta+(y)/(b)sin theta=1` is `b^(2)`

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NEW JOYTHI PUBLICATION-STRAIGHT LINES-QUESTIONS FROM COMPETITIVE EXAMS
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