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If the chord joining two points (a secth...

If the chord joining two points `(a sectheta_(1),btantheta)` and `(a sec theta_(2),b tan theta_(2))` passes through the focus of the hyperbola `(x^(2))/(a^(2))-(y^(2))/(b^(2))=1`, then `tan.(theta_(1))/(2)tan.(theta_(2))/(2)=`

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