plot(tan(x))
plot(tan(x), -pi, pi, ymin = -10, ymax = 10, detect_poles = 'show')
plot(tan(x), -pi, pi)
plot(tan(x), -pi, pi, ymin = -100, ymax = 100)
plot(tan(x), -pi, pi, detect_poles = 'show')
plot(tan(x), -pi, pi, ymin = -10, ymax = 10, detect_poles = 'show') + plot(2*x, -pi, pi)
f(x)=5*x
f(5)
