A geometry problem by Vishnu Vaidya

Geometry Level pending

Let PA and PB be two tangents from an external point P to a circle with center at O. Let PD be a secant intersecting the circle at C and D such that C is between P and D. Let Q be a point on DC such that angle DAQ = angle CBP. If angle PAC = 22.5 degrees, what is the measure of QBD in degrees?

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