Romero
int_{0}^{2\pi} cos^2(x) dx



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Romero
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\[\int\limits_{0}^{2\pi} \cos^2(x) dx \]

nbouscal
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Use the identity \(\cos^2x=\dfrac{1+\cos2x}{2}\)

Romero
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got it thanks.

Romero
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Got pi