Display of Lissajous-figures: From the vector
t=0:0.1:4*pi; create the trigonometric expressions
x=sin(0.5*t+1); und y=cos(1.5*t);. The plot x vs. y
is called Lissajous-figure. Create different figures by
variating the constants 0.5,1,1.5 in the definition.
Partial solution: