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যদি

y = \sqrt{\cos 2 x}

\frac{d y}{d x}

সমান -

- \frac{\sin 2 x}{\sqrt{\cos 2 x}}

\frac{\cos 2 x}{\sqrt{\sin 2 x}}

\frac{2 \sin x}{\sqrt{\tan x}}

\frac{\tan 2 x}{\sqrt{\sin 2 x}}

ANS : 1

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