1.

The points of intersection of the perpendicular tangents drawn to the ellipse 4x^(2) + 9y^(2) = 36 lie on the curve.

Answer»

`X^(2) + y^(2) = 13`
`x^(2) - y^(2) = 5`
`x + y = 5`
`(x^(2))/(9) + (y^(2))/(4) = 1`

ANSWER :A


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