Question Number 216974 by issac last updated on 25/Feb/25
$$\mathrm{Q216887} \\ $$$$\underset{{n}=\mathrm{1}} {\overset{\mathrm{n}} {\prod}}\:\mathrm{cos}\left(\mathrm{2}^{−{n}} {x}\right)=\frac{\mathrm{si}\cancel{\mathrm{n}}{x}}{\cancel{{n}}}={six}=\mathrm{6} \\ $$$${p}_{{n}} \left({x}\right)=\mathrm{6} \\ $$$${Q}.{E}.{D} \\ $$