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Which one of the following is independen...

Which one of the following is independent of `alpha` in the hyperbola `(0lt alphaltpi/2)x^2/(cos^2alpha)-y^2/(sin^2alpha)=1`

A

Eccentricity

B

Abscissae of foci

C

directrix

D

vertex

Text Solution

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The correct Answer is:
B
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