thank you very much for helps
see you later

for example;

restart: with(plottools):

a0:=point([1,0,0]):  (b,c,d other points)
e:=rotate( a0 ,alpha, [ [0,0,0],[b,c,d] ] );
e:=POINTS([.6735015928, -.6914808110, .2612468034])

i want to separate the coordinates of the point e.
for example ex,ey,ez and i want to use  this coordinates in the other equations.

thank you for help.