Question Number 166719 by mathlove last updated on 26/Feb/22
$$\mathrm{sin}\:{x}\mathrm{cos}\:{x}\mathrm{cos}\:\mathrm{2}{x}={a} \\ $$$${any}\:{price}\:{to}\:{a} \\ $$$${is}\:{corect}\:{the}\:{answer}\:\:\:\:{a}=? \\ $$
Commented by cortano1 last updated on 26/Feb/22
$$\:\mathrm{sin}\:\mathrm{2x}\:\mathrm{cos}\:\mathrm{2x}\:=\:\mathrm{2}{a} \\ $$$$\:\mathrm{sin}\:\mathrm{4}{x}\:=\:\mathrm{4}{a} \\ $$$$\:{a}=\frac{\mathrm{sin}\:\mathrm{4}{x}}{\mathrm{4}} \\ $$