If from an external point P of a circle with centre O, two tangents PQ and PR are drawn such that ∠QPR = 120degree, prove that 2PQ= PO.

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answered Feb 4, 2018 by Vikash Kumar (144,729 points)

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If from an external point P of a circle with centre O, two tangents PQ and PR are drawn such that ∠QPR = 120degree, prove that 2PQ= PO.

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