I have an expression on the form

a,b,c,d are constants different from 0. It should be possible to put it on the formCode:a*sin(w)^{3}+ b*sin(w) -------------------- (1) c*cos(w)^{3}+ d*cos(w)

where p,q,r are constants. Can anyone see how this can be done (if possible)?Code:`p*tan(w) - q*tan(w)^3 ---------------------- (2) 1 - r*tan(w)^2`

Br

niaren