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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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`=b^2`
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KUMAR PRAKASHAN-STRAIGHT LINES-Miscellaneous Exercise : 10
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