the angle subtended by common tangents of two ellipses 4(x-4)2 +25y2=100 4(x+1)2 + y2=4 at the origin (in degrees) is
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the angle subtended by common tangents of two ellipses 4(x-4)2 +25y2=100 4(x+1)2 + y2=4 at the origin (in degrees) is