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Let Delta(k) be the area of triangle AP...

Let `Delta_(k)` be the area of triangle `AP_(k)B` which is inscribed in a circle or radius 2 units. If AB diameter of circle , ` angle ABP_(k)=(lpi)/(2n) and sum_(k=1)^(n+1)=4 cot""(pi)/(32)`, then ` (n)/2` is equal to

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