-\frac{\pi }{4}\\\\arcCos\frac{1}{2}>arctg(-1)\\\\2)arcCos(-\frac{\sqrt{3} }{2})=\frac{5\pi }{6}\\\\arcSin\frac{1}{2}=\frac{\pi }{6}\\\\\frac{5\pi }{6}>\frac{\pi }{6}\\\\arcCos(-\frac{\sqrt{3} }{2})>arcSin\frac{1}{2}" alt="1)arcCos\frac{1}{2} =\frac{\pi }{3}\\\\arctg(-1)=-\frac{\pi }{4}\\\\\frac{\pi }{3}>-\frac{\pi }{4}\\\\arcCos\frac{1}{2}>arctg(-1)\\\\2)arcCos(-\frac{\sqrt{3} }{2})=\frac{5\pi }{6}\\\\arcSin\frac{1}{2}=\frac{\pi }{6}\\\\\frac{5\pi }{6}>\frac{\pi }{6}\\\\arcCos(-\frac{\sqrt{3} }{2})>arcSin\frac{1}{2}" align="absmiddle" class="latex-formula">