the graph of y = cos x and the line y = 1/2 over the interval [0^@,360^@]. Where do the two graphs intersect? Give exact answers in degrees

the graph of y = cos x and the line y = 1/2 over the interval [0 degree,360 degree]. Where do the two graphs intersect? Give exact answers in degrees

$$\small{\text{$ \begin{array}{rcll}\cos{(x)} &=& \frac12 \\\\\cos{(x)} &=& \frac12 & \qquad | \qquad \pm\arccos{} \\\\x_{1,2} &=& \pm \arccos{(\frac12 )}\\\\x_{1,2} &=& \pm 60 \ensurement{^{\circ}} \\\\x_{1} &=& 60 \ensurement{^{\circ}} \\\\\\ x_2 &=& -60\ensurement{^{\circ}} + 360 \ensurement{^{\circ}} \\\\ x_2 &=& 300 \ensurement{^{\circ}} \end{array}$}}$$