. . .
terminal
. . .
ipython3 --pylab
. . .
dm = 360
deg = linspace(- dm, dm, 2 * dm + 1)
y = cos(radians(deg - 45))
plot(deg, y)
xlim(- 360, 360)
xticks([-360, -270, -180, -90, 0, 90, 180, 270, 360])
ylim(- 1.5, 1.5)
xlabel('x [deg]')
ylabel('y = cos(x - pi/4)')
. . . 
save slika.png
