1.

If alpha, beta are the eccentric angles of the extremities of a focal chord of the ellipse x^(2)/16+y^(2)/9, " then "tan""alpha/2tan""beta/2=

Answer»

`(SQRT(5)+4)/(sqrt(5)-4)`
`9/23`
`(sqrt(5)-4)/(sqrt(5)+4)`
`(8sqrt(7)-23)/9`

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