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![[Post New]](/templates/default/images/icon_minipost_new.gif) 8 Mar 2008 19:10:31 IST
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Normals are drawn to the hyperbola
x2/a2-y2/b2=1 at point having parameters A and B, meeting the conjugate axes at P and Q .
A + B=pi/2
prove that
CP.CQ=a2e4/(e2-1)
where C is centre of hyperbola
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