The angle between the pair of tangents from the point (1, 1/2) to the circle x^2 + y^2 + 4x + 2y - 4 = 0 is

JEE Advanced Mathematics question

The angle between the pair of tangents from the point to the circle is

Answer: (B)

*Geometric method.* Centre , . Distance .

If is the angle between the tangents at P, then , , . Hence

2α==-

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Question ID VK-108938