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[" In a "/ABC" ,the value of "(a cos A+b...

[" In a "/_ABC" ,the value of "(a cos A+b cos B+ccos C)/(a+b+c)],[" is equal to "],[[" (A) "(T)/(R)," (B) "(R)/(2r)],[" (C) "(R)/(r)," (D) "(2r)/(R)]]

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