Problem:
Find the divergence of the vector field $f(x,y,z)\uvec{i} + g(x,y,z)\uvec{j} + h(x,y,z)\uvec{k}$ where $f(x,y,z) = \tan \left(\frac{x}{z}\right)$, $g(x,y,z) = \frac{1}{\sqrt{y^3}}$, and $h(x,y,z) = \sin ^{-1}(z)$
from sympy import *
from sympy.vector import *

C = CoordSys3D('C')
x, y, z = C.x, C.y, C.z
f = tan((x/z))
g = (1/(sqrt(y**3)))
h = asin(z)
field = f * C.i + g * C.j + h * C.k
print(divergence(field))
