In the shown figure, BC is a chord and CD is a tangent through the point C. If ∠AOC=112°, then find ∠ACD.

Given: 

BC is a chord and CD is tangent at point C. 

A tangent drawn to the circle makes right angle with the center of the circle. 

Angle subtended at the center = 2× Angle subtended at the arc of circle 

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