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Mathematics
Mathematics
Problem
Let
G
(
x
)
=
∫
0
x
cos
(
5
t
)
d
t
G(x)=\displaystyle\int_{0}^{x} \cos(5t)\,dt
G
(
x
)
=
∫
0
x
cos
(
5
t
)
d
t
. Evaluate
G
′
(
π
2
)
G'\!\left(\dfrac{\pi}{2}\right)
G
′
(
2
π
)
.
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