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WOLFRAM|DEMONSTRATIONS PROJECT

Signed and Unsigned Area under a Curve

​
a
1.571
This Demonstration calculates the area between the
x
axis and the graph of the function
2
x
sin(x)
​
from
π/2
to
a
. The area is usually taken to be signed, so that parts below the axis are negative and those above are positive. However, integrating the absolute value of the function gives the unsigned area.
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