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Question

\cos 2 θ = \frac{1}{\sqrt{2}}

সমীকরণের সাধারণ সমাধান কোনটি?

2 n π \pm \frac{π}{2}

nπ \pm \frac{π}{3}

nπ \pm \frac{π}{8}

2 nπ \pm \frac{π}{4}

ANS : 3

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