\{x \in R: \cos 2 x+2 \cos ^2 x=2\} is equal to

Correct Answer is : {nπ±π6:n∈Z}

\{2 n \pi+\frac{\pi}{3}: n \in Z\}

\{n \pi \pm \frac{\pi}{6}: n \in Z\}

\{n \pi+\frac{\pi}{3}: n \in Z\}

\{2 n \pi-\frac{\pi}{3}: n \in Z\}

EAMCET Engineering 2008 Solved Paper

Section: Mathematics

Question : 108 of 160

Marks: +1, -0

{x∈R:cos‌2‌x+2cos2x=2} is equal to

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