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\int \cos^{2} \frac{x}{2} d x

= কত?

\sin^{2} \frac{1}{x} + c

2 \cos \frac{x}{2} + c

="http://www.w3.org/1998/Math/MathML">2cosx2+c

\frac{1}{2} (x - \sin x) + c

\frac{1}{2}) x + \sin x) + c

ANS : 4

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