1.

The locus represented by x=(a)/(2)(t+(1)/(t)),y=(a)/(2)(t-(1)/(t)) is

Answer»

`X^(2)+y^(2)=a^(2)`
`x^(2)-y^(2)=a^(2)`
`2X^(2)-y^(2)=a^(2)`
`x^(2)-2Y^(2)=a^(2)`

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