Question Number 169650 by mnjuly1970 last updated on 05/May/22
$$ \\ $$$$\:\:\:\:\:\:\:{f}\left({x}\right)=\:\mathrm{3}\mid\:{sin}\left({x}\right)\mid\:−\mathrm{4}\mid{cos}\left({x}\right)\mid \\ $$$$ \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:\:{R}_{\:{f}} \:=? \\ $$
Commented by mkam last updated on 05/May/22
$$−\mathrm{4}\:\leqslant{f}\left({x}\right)<\mathrm{3} \\ $$