Question Number 117654 by jeewanbee640 last updated on 13/Oct/20
Commented by prakash jain last updated on 13/Oct/20
$$\left({ii}\right)\:\mathrm{does}\:\mathrm{not}\:\mathrm{have}\:\mathrm{period}\:\mathrm{2}\pi \\ $$$${f}\left(\mathrm{1}\right)=\mathrm{1} \\ $$$${f}\left(\mathrm{2}\pi+\mathrm{1}\right)=\mathrm{8}\pi+\mathrm{4}\neq{f}\left(\mathrm{1}\right) \\ $$