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For hyperbola x^2/(cos^2alpha)-y^2/(sin^...

For hyperbola `x^2/(cos^2alpha)-y^2/(sin^2alpha)=1`which of the following remains constant with change in `alpha`

A

abscissae of veritces

B

abscisae of foci

C

eccentricity

D

directrix

Text Solution

Verified by Experts

The correct Answer is:
b
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