Answer
$x=0, \,\,\,\,\,\,\,\,\,\,\,\,y=1,$
$x=\frac{\pi}{4}, \,\,\,\,\,\,\,y=0.70710678,$
$x=\frac{\pi}{2}, \,\,\,\,\,\,\,y=0$
$x=\frac{3\pi}{4}, \,\,\,\,\,\,\,y=-0.70710678,$
$x=\pi, \,\,\,\,\,\,\,y=-1,$
$x=\frac{5\pi}{4}, \,\,\,\,\,\,\,y=-0.70710678,$
$x=\frac{3\pi}{2}, \,\,\,\,\,\,\,y=0,$
$x=\frac{7\pi}{4}, \,\,\,\,\,\,\,y=0.70710678,$
$x=2\pi, \,\,\,\,\,\,\,y=1,$
Work Step by Step
We observe;
$x=0, \,\,\,\,\,\,\,\,\,\,\,\,y=1,$
$x=\frac{\pi}{4}, \,\,\,\,\,\,\,y=0.70710678,$
$x=\frac{\pi}{2}, \,\,\,\,\,\,\,y=0$
$x=\frac{3\pi}{4}, \,\,\,\,\,\,\,y=-0.70710678,$
$x=\pi, \,\,\,\,\,\,\,y=-1,$
$x=\frac{5\pi}{4}, \,\,\,\,\,\,\,y=-0.70710678,$
$x=\frac{3\pi}{2}, \,\,\,\,\,\,\,y=0,$
$x=\frac{7\pi}{4}, \,\,\,\,\,\,\,y=0.70710678,$
$x=2\pi, \,\,\,\,\,\,\,y=1,$
