1.

Rectangular hyperbola is the hyperbola whose asymptotes are perpendicularhence its equationis x^(2) - y^(2) = a^(2), if axes are rotated by 45^(@) in clockwise direction then its equation becomes xy = c^(2). Directrix of hyperbola xy = 16 are

Answer»

`X + y = 4sqrt(2)`
`x = y = 4sqrt(2)`
`x + y = 4 `
`x + y = -4 `

ANSWER :A


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