1.

Ifthe chord joining two points whose eccentric angles are alpha and beta cut the major axis of an ellipse (x^(2))/(a^(2))+(y^(2))/(b^(2))=1 at a distancefrom the centre then tan (alpha)/(2).tan (beta)/(2) =

Answer»

`(1+e)/(1-e)`
`(e+1)/(e-1)`
`(e-1)/(e+1)`
both 2&3

Answer :D


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