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Question

(a,b) is the mid point of the chord ¯AB of the circle x2+y2=r2. The tangent at A,B meet a C. then area of ΔABC


A

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B

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C

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D

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Solution

The correct option is B


Equation of the chord AB having (a,b) as M.P.S1=S11ax+by(a2+b2)=0 chord length = 2r2a2b2c=(ar2a2+b2,br2a2+b2)h=r2a2b2a2+b2Area=12×b×h


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