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Integrals
hard
0:00.0
Evaluate
∫
0
1
d
x
1
−
x
2
\int_0^1 \frac{dx}{\sqrt{1-x^2}}
∫
0
1
1
−
x
2
d
x
.
A
π
/
2
\pi/2
π
/2
B
π
\pi
π
C
1
1
1
D
0
0
0
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