AP EAPCET 25-Aug-2021 Shift 1 Paper

Section: Mathematics

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Question : 12 of 160

Marks: +1, -0

If n is a positive integer, then (1+i√3)n+(1−i√3)n=

2n−1‌cos‌
nπ
3
2n‌cos‌
nπ
3
2n+1‌cos‌
nπ
3
22n‌cos‌
nπ
3

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