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A calculus problem by حسن العطية

Calculus Level 2

$\int _{ 0 }^{ 1 }{ \sqrt { 1-{ x }^{ 2 } } \, dx } = \, ?$

\frac { \pi }{ 2 }

\pi

1

\frac { \pi }{ 4 }

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by حسن العطية

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