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[" 11.For the Hyperbola "(x^(2))/(cos^(2...

[" 11.For the Hyperbola "(x^(2))/(cos^(2)alpha)-(y^(2))/(sin^(2)alpha)=1" ,which "],[" of the following remains constant when "alpha],[" varies? "],[" 1) Ecentricity "],[" 3) Abscissae of vertices "4" ) Abscissae of foic "]

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