The angle subtended by common tangents of two ellipses 4(x-4)^2 + 25y^2 = 100 & 4(x+1)^2 + y^2 = 4 at the origin (in degrees) is (a) 30 (b) 45 (c)60 (d)90

Asked by  | 11th Nov, 2012, 01:08: PM

Expert Answer:

As the given two equations represent two ellipse having centre lying at (4, 0) and (-1, 0).and the common tangents are parallel to each other so angle subtended at origin will be 90 degree

Answered by  | 18th Nov, 2012, 07:49: PM

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