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Mathematics
Mathematics
Problem
The area of the region defined by
∣
∣
x
∣
−
∣
y
∣
∣
≤
1
||x| - |y|| \le 1
∣∣
x
∣
−
∣
y
∣∣
≤
1
and
x
2
+
y
2
≤
1
x^2 + y^2 \le 1
x
2
+
y
2
≤
1
in the
x
y
xy
x
y
plane is a.
π
\pi
π
b.
2
π
2\pi
2
π
c.
3
π
3\pi
3
π
d. 1
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