Y' = 2^sinx*ln2*cosx*ctg(x/3)+2^sinx*(-1/[sin(x/3)]^2)*1/3=
=2^sinx(ln2*cosx*ctg(x/3)-1/3[sin(x/3)]^2
e^(x^3)*3x^2*cosx -e^(x^3)*(-sinx) 3x^2 tgx
y'= ------------------------------------------------- = e^(x^3)* (------------ + ---------)
(cosx)^2 cosx cosx