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Mathematics
Mathematics
Problem
Evaluate
sin
{
n
π
+
(
−
1
)
n
π
4
}
\sin \left\{ n\pi + (-1)^n \frac{\pi}{4} \right\}
sin
{
nπ
+
(
−
1
)
n
4
π
}
; where
n
n
n
is an integer.
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