Question Number 129876 by LUFFY last updated on 20/Jan/21
Commented by Dwaipayan Shikari last updated on 20/Jan/21
$$\mathrm{2} \\ $$
Commented by LUFFY last updated on 20/Jan/21
$${baka} \\ $$$${solution} \\ $$
Commented by mr W last updated on 20/Jan/21
$$\mathrm{3} \\ $$$${x}=\mathrm{0}\:{and}\:{x}=\pm{a} \\ $$$${a}<\mathrm{3}\:\mathrm{sin}\:\left(\mathrm{sin}\:\left(\mathrm{sin}\:\left(\mathrm{sin}\:\mathrm{1}\right)\right)\right)\approx\mathrm{1}.\mathrm{883} \\ $$