4-10 Construct the circles with center at (cos(t),sin(t)) and tangent to the y-axis with t ranging over [0,2p].

> restart:

> x:=cos(t):

> y:=sin(t):

> r:=abs(cos(t)):

> m:=[x+r*cos(s),y+r*sin(s),s=0..2*Pi]:

> t:=2*Pi*n/100:

> plot([m$n=1..100],color=red,scaling=constrained,axes=none);