> x:=exp(t)/10*(5+cos(t))*cos(t); > y:=exp(t)/10*(5+cos(t))*sin(t); > z:=t+sin(12*t); x := 1/10 exp(t) (5 + cos(t)) cos(t) y := 1/10 exp(t) (5 + cos(t)) sin(t) z := t + sin(12 t) > with(plots): > spacecurve([x,y,z],t=0..Pi,numpoints=1000, > axes='BOXED',scaling='CONSTRAINED',thickness=2);