The diagram shows a sector AOB of a circle of radius 1 and centre O where A B 0 The lines AB A B2 A B3 are perpendicular to OB A

Question

The diagram shows a sector AOB of a circle of radius 1 and centre O where A B 0 The lines AB A B2 A B3 are perpendicular to OB A B A B2 are all arcs of circles with centre O Calculate the 0 B3 to infinity of the ore longtho B AR A B D B D

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