3102.sagews

t = var('t')
x(t) = sin(t)
plot(x(t), (0, 10))

f = 1
omega = 2*pi*f
t = var('t')
x(t) = sin(omega*t)
plot(x(t), (-1, +1))

f = 2
omega = 2*pi*f
x(t) = sin(omega*t)
plot(x(t), (-1, +1))

f = 1
omega = 2*pi*f
x(t) = sin(omega*t + pi/4)
plot(x(t), (-1, +1))

f = 1
omega = 2*pi*f
x(t) = sin(omega*t) + 1/3*sin(3*omega*t)
plot(x(t), (-1, +1))

plot(sin(omega*t)*sin(20*omega*t), (-1,+1))