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Question

The curve described parametrically by y=Btanθ and x=Asecθ represents

A
Ellipse
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B
Parabola
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C
Hyperbola
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D
Circle
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Solution

The correct option is C Hyperbola
Eliminating the parameter θ using sec2θtan2θ=1
(xA)2(yB)2=1x2A2y2B2=1
Which is standard form of a hyperbola.

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