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For hyperbola x^2/a^2-y^2/b^2=1 , let n...

For hyperbola `x^2/a^2-y^2/b^2=1` , let n be the number of points on the plane through which perpendicular tangents are drawn.

A

If n=1, then e=`sqrt(2)`

B

if `ngt1`, then `0lteltsqrt(2)`

C

if n=0, then `egtsqrt(2)`

D

None of these

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The correct Answer is:
A, B, C
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