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In the given figure, PA and PB are two tangents to the circle with centre O. If ∠APB = 60^o then ∠OAB is

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In the given figure, PA and PB are two tangents to the circle with centre O. If ∠APB = 60o then ∠OAB is

(a) 15o (b) 30o (c) 60o (d) 90o

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 (b) 30o

Construction: Join OB

We know that the radius and tangent are perpendicular at the point of contact

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