A, B and C are three points on a circle such that the angles substended by the chords AB and Ac at the centre O are 90 and 110 degree respectively.Determine ∠BAC

A, B and C are three points on a circle such that the angles substended by the chords AB and Ac at the centre O are 90 and 110 degree respectively.Determine $∠ B A C$

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