1.

The tangents at an extremity (in the first quadrant )of latus rectum of the hyperbola (x^(2))/( 4) - ( y^(2))/( 5)=1meets x-axis and y- axis at A and B respectively . Then(OA)^(2) - (OB) ^(2) , where O is the origin , equals

Answer»

`-(20 )/( 9) `
` (16)/(9) `
` 4`
` -(4)/(3) `

Answer :A


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