Question

$cos( \frac{2^{1} \pi }{ 2^{64}-1 } )cos( \frac{2^{2} \pi }{ 2^{64}-1 } )cos( \frac{2^{3} \pi }{ 2^{64}-1 } )...=?$
find out

Answer 1

P=1/2^64 is the value required