For the Hyperbola (x²)/(cos ²α) - (y²)/(sin ²α) = 1, which of the following remains constant when α varies = ?

Coordinate Geometry: JEE Main 2007 Mathematics question

JEE Main 2007 · Annual, Paper 1 · Q3958

JEE Main 2007Annual, Paper 1MathematicsMediumCoordinate Geometry478× since 2002

For the Hyperbola

{{{x^2}} \over {{{\cos }^2}\alpha }} - {{{y^2}} \over {{{\sin }^2}\alpha }} = 1

, which of the following remains constant when

\alpha

varies

=

JEE Main 2007 · Annual, Paper 1 · Q3958

JEE Main 2007Annual, Paper 1MathematicsMediumCoordinate Geometry478× since 2002

For the Hyperbola

{{{x^2}} \over {{{\cos }^2}\alpha }} - {{{y^2}} \over {{{\sin }^2}\alpha }} = 1

, which of the following remains constant when

\alpha

varies

=