JEE MATHEMATICS MCQ: COMPLEX NUMBERS

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Analyzing +4 | -1

The value of

\sum\limits_{{k=1}}^n(n-k) \cos \frac{2 k \pi}{n}(n \geq 3)

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Correct option: D

-n

Option D (-n) is correct because the summation simplifies to -n using trigonometric identities and series summation formulas.

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