JEE Main 2012 Mathematics question
An ellipse is drawn by taking a diameter of the circle as its semiminor axis and a diameter of the circle as its semi-major axis. If the centre of the ellipse is the origin and its axes are the coordinate axes, then the equation of the ellipse is
Answer: (4)
Solution
Semi-minor axis b = 2 (diameter of the unit circle); semi-major axis a = 4 (diameter of the radius-2
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