\(x\in\left(0;\dfrac{\Omega}{2}\right)\)
=>\(x+\dfrac{\Omega}{4}\in\left(\dfrac{\Omega}{4};\dfrac{3}{4}\Omega\right)\)
=>\(sin\left(x+\dfrac{\Omega}{4}\right)\in\left(\dfrac{\sqrt{2}}{2};1\right)\)
=>\(\sqrt{2}\cdot sin\left(x+\dfrac{\Omega}{4}\right)\in\left(1;\sqrt{2}\right)\)
=>\(m\in\left(1;\sqrt{2}\right)\)