Problem:
Find the jacobian of the vector valued function $\begin{pmatrix} f(x,y,z)\\ g(x,y,z) \\ h(x,y,z)\end{pmatrix}$ where $f(x,y,z) = \cos (z)$, $g(x,y,z) = \frac{y^2}{x^2}$, and $h(x,y,z) = \sqrt{y-z}$
from sympy import *
from sympy.abc import x, y, z

f = cos(z)
g = ((y**2)/(x**2))
h = sqrt(y-z)
X = Matrix([f, g, h]) 
print(X.jacobian((x, y, z)))
