Thanks. This lets me complete the derivation in maple. It would be nice if maple took care of the intermediate substitutions automatically.

Thanks. This lets me complete the derivation in maple. It would be nice if maple took care of the intermediate substitutions automatically.

Thank you, that worked.

What is the best way to make maple derive the

L1:=tan (a(t)) = w(t)/u(t);

L2:=sin (b(t)) = v(t)/V(t);

L3:=V(t)^2 = u(t)^2 + v(t)^2 + w(t)^2;

from the initial 

u = V * cos(a) * cos(b)

v = V*sin(b)

w = V*sin(a)*cos(b)

?

Thank you, that worked.

What is the best way to make maple derive the

L1:=tan (a(t)) = w(t)/u(t);

L2:=sin (b(t)) = v(t)/V(t);

L3:=V(t)^2 = u(t)^2 + v(t)^2 + w(t)^2;

from the initial 

u = V * cos(a) * cos(b)

v = V*sin(b)

w = V*sin(a)*cos(b)

?