What is the value of \cos({A+B}/2)\cos({B+C}/2)\cos({C+A}/2) ? [NDA I 2016]

Correct Answer is : None of the above

Correct Answer is : None of the above

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UPSC NDA I 2016 Mathematics Solved Paper

For the next two (2) items that follow :
Consider a triangle ABC in which
cosA+cosB+cosC=√3sin

[NDA I 2016]

Question : 37 of 120

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What is the value of

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