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JEEMAIN-2014
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Q)
If $w$ is an imaginary cube root of unity, then the value of $\sin \{(w^{10}+w^{23})\pi -\large\frac{\pi}{4} \}4 is
$\begin{array}{1 1} \large\frac{-\sqrt 3}{2} \\ \large\frac{-1}{\sqrt 2} \\ \large\frac{1}{\sqrt 2}\\\large\frac{-\sqrt 5}{2}\end{array} $
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