Solve arccos(x)=π3\arccos(x) = \frac{\pi}{3}arccos(x)=3π for xxx.
x=32x = \frac{\sqrt{3}}{2}x=23
x=12x = \frac{1}{2}x=21
x=−12x = -\frac{1}{2}x=−21
x=22x = \frac{\sqrt{2}}{2}x=22