TS EAMCET 4-Aug-2021 Shift 2 Question Paper

Section: Mathematics
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Question : 27 of 160
 
Marks: +1, -0
In a triangle, if the length of the sides a, b and c are three consecutive natural numbers and a<b<c, then (cos‌A+cos‌B+cos‌C)2‌abc =
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