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Length of common tangents to the hyperbo...

Length of common tangents to the hyperbolas `x^2/a^2-y^2/b^2=1` and `y^2/a^2-x^2/b^2=1` is

A

`x+y=sqrt(a^(2)-b^(2))`

B

`x-y=sqrt(a^(2)-b^(2))`

C

`x+y=-sqrt(a^(2)-b^(2))`

D

`x-y=-sqrt(a^(2)-b^(2))`

Text Solution

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The correct Answer is:
A, B, C, D
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