Use the Chain Rule to find parts a and b
a) Find dw/dt
w = ln(sqrt(x²+y²+z²)), x = 4 sin(t), y = 6 cos(t), z = 2 tan(t)
b) Find ∂z/∂s and ∂z/∂t.
z = tan(u/v), u = 6s + 7t, v = 7s − 6t