Question

please send the answer process!!!!!!!!!!!

Answer 1

Answer :
$2 \cos( \frac{\pi}{ {2}^{4 + 1} } ) = 2 \cos( \frac{\pi}{32} )$


For More Generalised Expression :
i.e. till n- square roots :
$2 \cos( \frac{\pi}{ {2}^{n + 1} } )$


Identities Used :
1)
$2 \cos( \frac{x}{2} ) = \sqrt{2 + 2 \cos(x) }$
Hope you understand my answer and it may helps you !