two tangents pa and pb are drawn from an exteral point 'p' to a circle with centre 'o' . prove that AOBP is a cyclic quadrilateral
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Since, OA⊥AP and OB⊥BP
∠PAO+∠PBO=90
o
+90
o
=180
o
⟹∠APB+∠AOB=180
o
⟹AOBP is a cyclic quadrilateral.
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