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Evaluate
90
∫
0
π
/
2
cos
(
x
)
d
x
.
\text{Evaluate }90\int_0^{\pi/2} \cos(x) \; \text dx.
Evaluate
90
∫
0
π
/2
cos
(
x
)
d
x
.
Please answer the question so we know you are human. The answer is an integer.
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