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Question

Two circles C (O, r) and C (O', r') intersect at two points A and B and O lies on C(O', r'). A tangent CD is drawn to the circle C(O', r') at A. Then


A
OAC=OAB
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B
OAB=AOB
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C
AOB=AOB
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D
OAC=AOB
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Solution

The correct option is A OAC=OAB
OB = OA (radius of circle)
CAO=OBA
(angles in alternate segments are equal)
Now, if CAO=OBA
OAC=OAB
Since,OBA=OAB (Isosceles triangle)
option (a) is correct

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